Hormones affect the way your brain works. Men and women have different hormones/levels. Biological imperitives (instinctual) for men and women are different. They had to be for our species to survive and get to where it is now.

These are physical things that form a difference in our thinking. I definately think that men and women aren't the same in the mind.

Camp men can't live without women because men don't like them, they'd have no friends otherwise. Also, they strive to be womanly so hanging out with women makes sense...

Straight acting gay men would be a different case, I think.