The unforgiving actor tells women's style magazine Elle that he hates placating women and refuses to accept his partner gaining weight because it leads to insecurity issues.
He says, "When a woman isn't feeling good about herself and you combine that with her period, eventually she'll ask you if you like her body. You have to say no... I don't placate."
He also admits he fell in love with the majority of his female co-stars and counts them all as ones that got away.
Klein adds, "I've got this policy that you don't sleep with them (co-stars); it complicates stuff.
"So it's the HEATHER GRAHAMs, the REBECCA ROMIJNs, the MENA SUVARIs, and the LEELEE SOBIESKIs of the world. They all got away."
Meanwhile, the actor admits he plans to stay friends with his ex, even though they no longer speak to one another.
He states, "Are we friends? Absolutely. Do we talk? No."