Is female semen not good to eat?

The fluid that secretes out of vagina is not semen.

Its just a lubricating liquid that facilitates penetration.

It can be called cum

It can be tasted, though its not yummy.. If healthy and clean the fluid is almost tasteless with slight tang. However if strong and/or foul then there is something wrong (likely an infection as opposed to an STD, but would be a concern)