Oh man, I had to do one of these the other day.
It wasn't stage acting or film acting, it was just a little project for my language class. We had to write a screen play and then act it out on camera so that we could show it to the class.
Well in one scene I need to kiss my friend Amanda, oh man it was awkward.
We coreographed the whole thing and practiced it a bunch of times so that it looked real. That was probably a bad idea. I was uncomfortable at first and then I realized, "This isn't me kissing Amandam this is Eric kissing Fezla..." Don't ask about the names of the characters...
This is just one thing I can add to my experience, even though it is a small amount of it.