Best positions: Reverse cowgirl, missionary “Tender little skateboarder types should best be laid down flat while you practice some reverse Asian cowgirl,” says Dr. Milrod. “This means straddling him with your back facing him and grabbing his bent knobby knees for support. Great for serious G-spot action. Skinny guys can usually go longer: After all, they are not dragging around a lot of extra weight. And surprisingly, many of them sport some very large penises, so there's meat where it counts!” Even if your guy is as petite as they come, remember: No body image issues allowed. “Many skinny men actually sort of fetishize being with big beautiful women,” Britton says. “There is a porn genre of fetish called BBW for this.” And what if you’ve tried a few different things, but sex is still really awkward? Trial and error, baby — and do it all with a smile on your face. “The best sex occurs when you laugh yourself into bed with somebody,” says Dr. Roger Libby, a sex therapist in Seattle. “Most people take sex way too seriously.”