This is actually a kind of gross thought. It came to me while reading Poppy Z. Brite's Exquisite Corpse. Which, as an aside, is very good until the end. Which sucks.
Okay... so. Jean-Claude can't get an erection before a feeding because of "blood pressure." But corpses get erections randomly, and I doubt they have much blood pressure. Unless, of course, the erections have more to do with rigormortis than blood flow...
Thoughts?