Taste of Sperm

One day on campus, there was biology. The professor was explaining about the sperm and reproduction equipment ....

Professor: Sperm contains a lot of glucose, substances in the sugar ...."

Then there was beautiful and sexy student asked ...

Disciple: "But professor, why it was not sweet?"

All students in the class was laughing.

Then the professor casually explained ....

Professor: "Clearly not sweet, because the sweet taste on the tongue in front of the tongue rather than in the back of the throat ..."