I guess it depends on if you want sex with a man or a woman. For me personally, I think doggystyle and missionary works the best. Doggystyle you can spread a woman's ass and let your cock go in as deep as you can while your balls slap her pussy. And missionary, you can put her legs up on your shoulders and it will allow you to get deeper as well. Plus that way you can look her in the eyes and tell her all the filthy things you want to do to her.................Sorry, I got carried away for a moment.