I assume you are asking the point of the joke. It depends on a knowledge of both Wester culture and the Christian religion. In the Christian story of man's origin, God created just two people - a man and a woman (Adam and Eve). The joke comes from the fact that Adam is implying that someone else was the father of Eve's children. Since he is the only man (at that time) who else could it possibly be? Jokes like these don't "travel" well to another culture or language.

It is joke again...