Have you ever noticed how EVERY time you have sex with a man, he giggles a little bit afterwards? ALL of the time. I believe it's a release of emotion like the others have suggested.
Sometimes, my heart contracts when I've been with someone and the feelings that have been expressed are so intense that it's almost like the feeling that I would wish to have if I were to have a relationship with someone.
I have boundaries. Heck, we ALL do. But it is not uncommon (sorry for the double negative in a sentence) to really have a strong feeling for another person when in such an intimate situation with him or her.
I'm trying to think of something funny or light to add to this post but I cannot. Heck! How about that? A green frog with a red tongue! That should do it!
Warmly,
Elisabeth