I am wondering what is the best approach to take when telling my girlfriend I would like a threesome.
What worked for me was telling her that if we did a MFF, then we would do a MMF..Worked for me and enjoyed the heck out of both of them...Also very important to discuss before your get together what the limits are going to be. Is it ok for you to Kiss or penetrate the other female or what's expected of you and your partner.
Good Luck..