Yes many times with my partner we both get a real buzz out of it. She loves oral sex and she has sucked me several times in front of our like minded friends. It really brings out the exhibitionist in both of us. When I'm ready to cum she likes me to straddle her breasts and wank to completion into her mouth and to be honest at this stage I don't care who's watching in fact to see other couples staring at me vigorously wanking and shooting into her mouth turns me on and my partner will usually look at them and smile with her lips covered and her mouth full of my spunk