Since she is always so accomodating whenever I ask her to try new things, I really want to do this to give my girlfriend a thrill but I am way cowardly about it. She gets very aroused when she talks about watching me have sex (either pitching and/or catching) with another straight guy. I think she may even have a distant acquaintance in mind for this little "event". I've never done any same-sex stuff -not even masturbating with a friend although I do enjoy a finger up the butt now and then. She and I have talked about this for a couple of years now and I feel like it's my turn to grant her an outrageous request (like the FFM threesome she did for me). I am going to do this for her but I am still very twitchy about it. Has anyone had any similar experiences that you could share so I can get more comfortable with the "project" and maybe get some of my questions answered?