Astrogay: Sex Cruising with the Stars by Clu Lee Lennuck 1973, Paperback
Doing it by starlight is far out! Especially so because the stars arranged the whole thing to start with. If you want to know what makes you tick sexually, what kind of guy reacts best to your specialities, what kind of hunky hangs to avoid like a plague... that's ASTROGAY. It makes your cruising pay off!