The Pleasures of Sex

How the science of sex can lead to more pleasurable sex

Why You Can't Eat (or Can't Stop Eating) After a Breakup

Investigating the gut-brain response

We often find what we need when we’re not looking for it. That’s how it was for me today, spending a lazy Sunday searching the scientific literature for research related to “communication about feelings” (isn’t that what everyone does on Sundays?).

Instead of finding research related to how people talk or avoid talking about their feelings, I found myself taken in by the first result: a 2011 article published in Nature titled “Gut feelings: the emerging biology of gut-brain communication.”

I was intrigued for two reasons: (1) one of my good friends, a neuroscientist, often talks about gut decisions (they are not always the "right" decisions to make but they deserve attention for various reasons); and (2) I had recently talked with another friend about some of my own gut-brain responses and it left me with a nagging question.

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What happened is this: I had shared a story about how, when I was 19, I lost my appetite for a week. I was healthy and happy with life except that I had ended a relationship with someone who I liked, but didn’t want to be with anymore, and I felt badly about it. The pain of hurting another person was, for me, so painful that my stomach hurt and I couldn’t eat, a result of my overly sensitive and overly empathic nature in which I took in his perceived pain and made it my own (in reality, I’m sure he was just fine).

So there I was, relatively unable to eat normally except for the lucky fact that my body was adaptive enough to crave a specific food each day. For the first few days, the only food I could bare to eat was watermelon. Then, some specific muffins from a specific bakery. After about a week, time healed, my appetite returned, and I mostly forgot about this odd gut-brain reaction.

That is, until the next time I found myself ending a relationship and once again losing my appetite. This came to be a cycle that repeated itself during times when I was ready to break up with someone, had already broken up with someone, or was experiencing sufficient relationship distress. I didn’t lose my appetite for days at a time due to any other type of stress, I told my friend; just relationship distress. And it was annoying.

“What about drinking?” he asked, as I sipped from a tasty lavendar drink at a favorite bar. “Did you ever lose your appetite for certain drinks?”

And it occurred to me that I hadn’t. Yet the scientist in me couldn’t figure out why I would so routinely and consistently lose my appetite for food in the face of relationship issues but never any type of alcohol.

Reading the Nature piece today has provided me with some sense of my own gut-brain connection, and perhaps—if you’ve experienced appetite issues in response to relationship distress, it may for you too. It seems that there’s a growing and (for me) fascinating area of research related to interactions between our gut (e.g., appetite, GI function, etc) and our brain (e.g., thoughts, memories, decision making, and emotions).

The article reviewed scientific findings related to the gut/brain that lead me to believe that the following—at least for me—may have happened:

1. When I was 19 and had my first significant breakup, I had a fairly typical stress response of changes to eating patterns.

2. Relationship-related distress is rare enough for me—and I am a highly sensitive/empathic person—and thus “memories of body states associated with previous feeling states” (this, from the article) perhaps became linked. That is, relationship distress is, for me, connected with loss of appetite going back to my first significant breakup.

3. Because I wasn’t really drinking alcohol very often at age 18 or 19, it wouldn’t have crossed my mind to want a drink, let alone to lose my appetite for a drink. Thus, I had no alcohol-related appetite loss in relation to relationship distress at the time, and it’s consequently never become part of how I deal with this now. It never became imprinted. 

I mention this because, in a recent class discussion about love, breakups, and communication, my students talked a bit about their own changes to eating patterns when faced with heartbreak. Some students talked about drinking more alcohol, or taking various drugs or pain medications, after a breakup. Other students talked about eating more than usual or less than usual when going through difficult relationship issues.

It’s common to experience changes related to eating (and to sleep) in response to relationship issues, including breakups. However, we have idiosyncratic patterns and the Nature article helped me to understand the numerous pathways that may be possible in creating these connections and establishing individuals’ patterns related to appetite, eating behaviors and their memories and emotions. I liked this part of the article:

“…body loops, or their meta-representations in the orbitofrontal cortex (OFC), may play a part not only in how somebody feels at a given moment but may also influence future planning and intuitive decision making. For example, according to Damasio, somatic markers may covertly result in ‘undeliberated inhibition of a response learned previously ... [or] the introduction of a bias in the selection of an aversive or appetitive mode of behavior.’”

My pattern of appetite loss is specific to me—and because it’s so predictable, when it happens at all I experience it as an annoyance since I like to eat and just want to get the whole “appetite loss” thing over with. I know that I'm fine; I just want to eat again. I’ve also found that, for me, the appetite loss is linked specifically with feeling bad about hurting another person. I can manage relationship distress. I can manage breakups. But, going back to childhood, I’ve always found it painful to do things that break another person’s heart—and it's that pain that seems to be linked with finding it too painful to eat. [Fortunately these days, I am eating 100 percent normally and happily.]

There’s nothing to “do” here; meaning, this isn’t a “5 Tips” or “10 Steps” piece. But if you find yourself interested in the topic, and have a science-y background, you may find the article to be an interesting read. And if you experience gut-related symptoms in response to relationship or sexuality issues, you might look for patterns in your own past, and memories, to see how a gut-brain reaction may have developed for you. It may even give you some insights in terms of how you might be able to care for yourself going forward. 

Debby Herbenick, PhD, MPH is an Associate Research Scientist and Co-Director of the Center for Sexual Health Promotion at Indiana University and the sexual health educator at The Kinsey Institute for Research in Sex, Gender and Reproduction. She is also the author of six books about sex and love; her newest is Sex Made Easy: Your Awkward Questions Answered for Better, Smarter, Amazing Sex. Follow her on Twitter @DebbyHerbenick.

Debby Herbenick, Ph.D., M.P.H., is a Research Scientist and Associate Director at The Center for Sexual Health Promotion and a sexual health educator at The Kinsey Institute.

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