This is a staple of movie sex scenes — two characters passionately embrace for the first time and, too lustful to make it to the nearest bed, simply get it on against the nearest wall. Like its wall-less equivalent, it's taxing on your upper-body strength, but the wall means you're not supporting all of your partner's weight. It also offers great access to the neck and breasts so you can get in a lot of passionate kissing, and a lot of intimate face-to-face time.