There are many different sexual positions in which to achieve pleasure, but the best positions are the ones that both you and your partner can enjoy. As the Kama Sutra — that ancient Indian book on sexuality — shows us, sexual activity is a pursuit of infinite variety. There are hundreds of ways in which male and female bodies can come together for mutual pleasure. If you're in a heterosexual relationship, knowing a variety of sex positions can help you be a better and more inventive lover for your partner. That answer is different for every couple. There are nonphysical factors to consider, too.