I'm not bi but had a 3some cause my boyfriend wanted to 'spice things up'. I gave in & regret it BIGTIME cause it was nothin like I expected! He even contacted the other woman behind my back & lied about it. That said....make sure it's really what YOU want because no matter how much you think you want it, it WILL change your relationship with him forever. Just be prepared & pick someone YOU trust!!! Good luck!!!
Isn't funny when they (men)say "spice things up"...its more like sour things up. The ONLY way you agree to a 3some is if no body loves or cares about anyone and/or your some dumb college kid. Otherwise the act will kill any and all trust. Nothing good comes from sharing your partner.