Is your own sperm bad to eat?

Answer 1

Health-wise, no, it's even slightly beneficial.

Or maybe irrelevant. It has no significant nutritional value.

Morally, you might consider it mass-cannibalism.

"Darling, I've swallowed the kids!"

Answer 2

Not if you're really devout. If you're really strict, you should only have sex in a way that might make a baby. Letting the sperm go elsewhere is seen as "wasting" it.