What does sperm taste like you heard it was like feet?

Sperm cells impregnate egg cells and are not visible to the naked eye; you are referring to semen, the fluid that contains sperm along with the nutrients the cells need to survive.

The environment of the vagina is acidic. This would kill the sperm cells, so seminal fluid is alkaline. Its taste and odour often remind people of other alkaline fluids, such as chlorine bleach. Semen is mostly made of fructose, a naturally occurring sugar, and some consider it to be sweet.

It is not abnormal to enjoy or to dislike the taste. Semen by itself is not harmful either, though anyone tasting it should be careful about sexually transmitted diseases.