Missionary, because its one of the most physically vulnerable positions in terms of penetration. Female must remain poised for the cock, and you can't really go anywhere.
Sexually with men, what turns me on is nice cologne that reminds me of one of my Ex-Boyfriends, Genuine yet assertive mannerism, Hardcore, Nice guns, Tattoos, Deep voice, clean shaven, pure and rough masculinity.
With women, nice perfume that reminds me of raves, a domineering personality, Extreme attentiveness to detail and creativity during a scene, Smarts, and a woman who thinks she can Dominate me.