The "Party" Line here is a no-brainer: "It gives you an erection, duh."

Erection drugs are prescription for a reason. If you have heart problems or high blood pressure, this isn't anything to fuck around with. Talk to your doc. First, don't use these drugs with poppers. Second, you could get a "Priapism" - an erection that won't go away. While this might sound like fun, it's actually really dangerous. If you have a boner that lasts 4 hours or longer, go to the doctor no matter how embarrassed (or busy) you are! Finally, some recent studies have shown that erection drugs can potentially cause blindness, although this is very rare. But, that's a fun decision to weigh: "Boner or blindness; boner or blindness. Hmm..."