Not at all.unless he, or it for that matter has a disease
No
No. Swallowing your own sperm is not harmful physically, although the emotional issues might be up for questioning.
No, it is perfectly harmless.
No she cannot get pregnant
Yes
harmfull
Alpacas are not harmfull. They are very gentle
A sperm cell can fertilize an egg, leading to pregnancy -- not everyone thinks that's harmful, of course. Other than that, sperm cells are harmless. But -- sperm cells are usually found in ejaculate (cum), and the body fluids in cum can carry sexually transmitted diseases like HIV.
it is harmfull because it can kill people around the world
bubble gum can hurt you by swalloing it... it will be in ur digestive system for 7 years
microbes are not all harmfull they can be but they are foundin the air and in water and in animals and in humans
no