Glued-In Allergy

I've been dating a guy for three months, and I'd like us to be exclusive, but I don't know how to go about addressing it. I'm worried that if I say I need him to commit, he'll feel pressured and bolt.

--Quandary

For a man, agreeing to go exclusive is a bit like wedding vows lite, as posed to the man's penis: "Do you swear off sex with all the other ladies forever?" Penis: "Frankly, that sounds a little grim." Men evolved to have the hots for sexual variety -- casual sex with a slew-apalooza of different partners -- to a degree women do not. (An ancestral woman could get pregnant and stuck with a kid to raise after a single hookup with some rando, while the more randos Grok had sex with, the more likely he was to pass on his genes.) Feminist scholars contend that "patriarchal" culture -- not evolution -- leads to men's greater preference for the sexual variety pack, but it even shows up in "gender-egalitarian" Norway. Evolutionary scientist Leif Edward Ottesen Kennair and his colleagues asked Norwegian men and women the number of sex partners they'd want over a 30-year period. Women, on average, wanted about five sex partners. Men? About 25! Still, many men eventually tire of the swipe-right hussy of the night lifestyle (which, admittedly, isn't an option for men low on the mate-value ladder) and start feeling ready for a relationship. However, even if this guy's open to commitment and maybe already pointed in that direction, consider the lesson from "psychological reactance," a term coined by psychologist Jack Brehm. Our getting the sense that somebody's trying to control us, limit our freedom, motivates us to "react": rebel against being controlled. Give yourself a (silent) deadline so you won't be waiting around forever, and then ask him how he sees things going forward: what he's looking for, what works for him. The conversation itself should give him the sense that you might be headed for the door if he doesn't boyfriend up. Wanting to be with you might motivate him to make the necessary sexual trade-off -- which is ultimately a pretty big deal for a dude. Picture the Souplantation buffet, but all those stainless steel bins are filled with the same one item, and you'll have to eat it for every meal for the rest of your life: "Welcome to the suburban gulag. Table for two?" ... For pages and pages of "science-help" from me, buy my latest book, "Unf*ckology: A Field Guide to Living with Guts and Confidence." It lays out the PROCESS of transforming to live w/confidence.