Cause think about it, AIDs is the one thing you can give to as many people as you want without losing it yourself. Imagine if some good things were like that! We'd all have shit loads of good stuff. And imagine if the good stuff had to be given with sex, like you could give people money without losing any yourself and all you had to do was have sex with them without a condom. Or you know happiness, or creativity, or cheese. Oh my god, you could give lots of cheese without sacrificing cheese by making love, that must be what heaven will be like.