According to Matthew McConaughey, honesty is the key to any successful relationship. That's why he turned down a very tempting offer of a Threesome!
McConaughey revealed to Loaded magazine: "Two sisters once offered themselves to me. But they weren't single and one wanted to get away from her husband. I don't jive with that. You don't sleep with someone's lady if they're married because it will return and bite you in the a**."
McConaughey also says: "I hide nothing. If you hide something and the relationship starts going good, whatever you're hiding, it's coming out. Better to get it all out on the table and say, 'That's what you're getting man.'"
Well, those girls must have felt really bad!