Robert Pattinson doesn't understand lovecheats!

Robert Pattinson has “never understood” why men cheat on their wives and girlfriends.

The 24-year-old actor who is in a relationship with his Twilight costar Kristen Stewart explained he had grown up believing people can be together for their whole lives, and thinks having to juggle various different women must be “like hell for a man”.

“There is one thing I’ve never understood, why people cheat,” Rob said. “My parents met when my mom was 17 and my father 25, they are still together and seem very happy. I grew up believing that you can be together all of your life

“I understand the impulse, but not how you can maintain two relationships for long. And though I understand that cheating can happen to those who have children, because the stress can make people stray, I can’t really understand how someone free of any commitment could possible choose to have four women at the same time. It must be like hell for a man.”

Rob recently admitted he has a “romantic soul” and could never have sex with someone he didn’t love.

“There is the idea of the saving love, I believe it. I’m not mushy but I have a romantic soul. Having grown up with two older sisters I have a deep respect for women. Sex and feeling for me go hand in hand,” he said.

“I’m not interested in casual relationships, I need to know people.”