What should I do? I don't like talking very much. In the face of excessive jokes from colleagues, I obviously care, but I don't know how to refuse.

How many jokes are made depends on your usual relationship and his motives. If he is a joker, he is like this to everyone, and there is no malice. Just bear it, and don't let jokes affect our relationship. If he is deliberately trying to embarrass you, tell him that you don't like such vulgar things and make him respect himself. The purpose of this is to prevent him from treating you as a fool who can make fun of you at will.