Why do some women let some men have their cake and eat it?

P.Diddy and Cassie in Cannes, France, yesterday

P.Diddy has three baby mamas...and one of those baby mamas, Kim Porter, is still the leading lady in his life. But he's also in a long term relationship with singer, Cassie. According to reports, Cassie and Kim are both currently in Cannes, France with P.Diddy. Some days you see the music mogul with Kim, some days he steps out with Cassie. And it seems these two women don't mind sharing one man.

What kind of a woman is comfortable dating a man for years knowing he has another serious woman in his life? I know it's a man's world, but why let them have their cake and eat it? Make him choose, dammit! :-)

What's your thoughts on this?