Popular at just about every frat and sorority house in America, the body shot is a classic and fun ritual, designed to give a sweet & sour taste from the sugar and lemon. Here are the basics on how to pull the body shot off--of course, feel free to add your own twist to the drink.
Using a partner of the opposite sex (or same, depending on how you swing), lick their neck, you're going to need a healthy dose of saliva very soon.
Sprinkle a bit of sugar onto their neck where you just licked them.
Place the wedge of lemon in your partner's mouth with the skin pointed inward.
Then, take your lick the sugar from their neck, then down the vodka, then suck the lemon from their mouth (while gently holding back of their neck).