My friends like to call it "the 28-year-old rule": As in, once you hit 30, you shouldn't expect more than fun, games and hard-to-hide hickeys from any guy younger than 29.

Now a new poll says even 31-year-old Ashton Kutcher is too wet behind the ears.

According to a new poll by British dating site, matchaffinity.com, 70 percent of women over 35 say they wouldn't date a man younger than 32.

We agree -- to a point. But first, we think, you have to define "date." If it's a sleepover we're talking about, we don't much care if he just blew out all 18 candles. But if you're getting ready to put a ring on it, it's best if the guy you're eyeing didn't graduate with Demi Lovato.

Sorry, Madonna, and all you Hollywood producers who are convinced that "Cougartown" is the next "Friends."

After the jump, our highly scientific bell curve of what age dude it's appropriate to date when.