"Makes" is a strong word, but a new study from Binghamton University has found a gene that may be connected with a pattern of one-night stands, acts of infidelity, and other unattached sexual encounters. Apparently, it all has to do with a dopamine receptor gene called DRD4:
"The motivation seems to stem from a system of pleasure and reward, which is where the release of dopamine comes in," Garcia said. "In cases of uncommitted sex, the risks are high, the rewards substantial and the motivation variable — all elements that ensure a dopamine 'rush.'"
In the study — which only examined 181 subjects, it should be noted, so take it with a grain of salt — people with this gene were twice as likely to get involved with such sexy activities. But that's not all this gene does:
The same gene has already been linked to alcoholism and gambling addiction, as well as less destructive thrills like a love of horror films. One study linked the gene to an openness to new social situations, which in turn correlated with political liberalism.
So… this is the "fun person" gene, then? (I kid, I kid! Mostly.) Unfortunately, this news isn't going to get you off the hook with your pissed off spouse, your bookie, or at your next intervention: the researchers are quick to note that while a gene may predispose someone towards an activity, there are people with DRD4 who won't sleep around, and many without it who will.