Discovering a guy's secret past: nothing destroys trust like hearing a bombshell about your man. But that news isn't necessarily a deal breaker.(COSMO NEWS)(Brief article)

Before Jennifer Aniston and model Paul Sculfor stopped dating, there was speculation that Jen was blissfully ignorant to Paul's party-boy past (he has reportedly abused cocaine). Turns out, he's not the only famous beau to harbor a secret. Vegas illusionist Criss Angel, who's been linked to Minnie Driver, Lindsay Lohan, and Cameron Diaz, has been married for five years (his wife has filed for divorce). And ER's Goran Visnjic, married for eight years, admitted to an affair after it resulted in a paternity suit this year.

How could a guy gloss over (or fiat-out avoid divulging!) such major info? "The male in every species is hardwired to present himself as desirable to keep that species going," says psychologist Daniel Goldfarb, PhD, coauthor of Red Flags! So men hide details that might turn you off--infidelity, drug use, arrests, flunking out of college, money problems. "Many guys will only come clean once they really trust you," adds Goldifarb.