Joseph did not sleep with Mary when she got the first pregnancy of Jesus. Joseph did not contribute anything into the body of Mary to make her pregnant. But he married her just after she got pregnant by the holy spirit , according to bible. But Jesus was born into his family, and he must have called him father/papa since young. Anyway, Joseph is not the fleshy father of Jesus, not like our fathers to us. In this way, we may say Jesus is the adopted son of Joseph, but born by his wife - strange! Eventually, who is the earthly father of Jesus? Nobody , right? Is this a shame in ancient jewish society? Yes! What can best be done to cover this shame? You guess ?