A girl was taking a biology class at harvard, and the teacher was telling the class that Seamen has sucrose in it.
The girl raised her hand and said, "If I understand correctly, you are saying Seamen has Sucrose, as in Sugar, in it."
The teacher said, "Yes that is correct."
Then he went on talking more about sperm.
The girl reaised her hand again and asked,"Then why doesn't it taste sweet?"
After a few seconds of total silence, the whole class just died laughing.
Then when she realised what she had implied there, her face turned beet red and she grabed her books and left, never to return.
The teacher kept a straight face and answered her question.
He said, "It doesn't taste sweet, because the taste buds for sweetness are on the tip of your tongue, not the back of your throat! Have a nice day.