Dudes, always blaming their dicks for making them cheat. But new research from the Bonn University Medical Center in Germany says oxytocin could be the key ingredient to strengthening monogamy in men.

In the study, 40 heterosexual men in long term relationships were shown photos of their partners as well as photos of other women. They were also given a dose of oxytocin via a nasal spray. When the subjects "received oxytocin instead of the placebo, their reward system in the brain when viewing the partner was very active, and they perceived them as more attractive than the other women."

Interestingly, when the dudes were later shown pictures of female coworkers or other women they knew, the oxytocin wasn't as effective. Based on this, it would seem that the hormone plays "an important role in partner bonding." But if you have to douse yourself in hormones just to prevent your partner from cheating, maybe you'd just be better off dumping his ass.

[Animal NY]