threesome?

ivy

Okay so my SO has brought up wanting to have a threesome. I was up for it until he started telling me all the stuff he wanted to do. We are eachother firsts and we have been together for two years. I'm just wondering how we should go about that. He doesn't want two males, he wants two females, and im getting really paranoid. Is there any advice you guys could give me to try and get over this hump?