Blame it on the a-a-a-alcohol? Even better: Blame it on your alleles. (If you can't remember biology class, we're talking about your genes here.) As this new video from AsapSCIENCE reveals, one study found that 50 percent of people with the long allele version of the dopamine-receptor gene cheated on their partner, compared to 22 percent of people with the short allele.

Likewise, the gene controlling the release of vasopressin, a hormone affecting trust, empathy, and social bonding, also factors in. And so does your earning potential relative to your partner's—plus a whole host of other things. So while some risky business inclinations may stem from your DNA, it's usually not the only thing at play.

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