Genuine question - can vampires survive off cum?

No, seriously, hear me out. The general explanation for why vampires drink blood is that it’s symbolic of life. Blood keeps you alive, blood is the sign of a living being, etc. But you know what else is very clearly and consistently symbolic of life around multiple traditions? Semen. It’’s the fluid that produces new life, so multiple theological, mystical and cultural stories have it as connected to life energy, life, creation, etc. So it makes sense that a vampire should be able to live on it by the same symbolic reasoning. This even explains why vampires are so sexual. If they can’t get blood… I don’t know what to do with this question, but it makes perfect symbolic sense? So there you go. * Pencil