Most of the components of semen are water, and a little protein. It can be said that there is no nutritional value at all. The fact that you can eat semen for beauty and good skin is not a reliable argument.

In ancient China, there is a "yin and yang" and "yang and yin". The former for the male female oral / intercourse, sucking each other's vaginal secretions, the latter is to eat sperm, the two sides have no disease is no excuse, no harm. But if one party suffers from inflammation and other contagious diseases, and it happens that the other party has ulcers and wounds in the mouth, it is likely to be infected. So please be careful.