Now, maybe a thousand years ago it made sense to people that after having their baby circumcised they should let the mohel suck their infant's bleeding cock, but, hello!
(P.S. I'm not trying to mock anyone's religion, but I think every religion has to update itself with the times and as knowledge and understanding changes. Religions, like everything else, need to adapt to their changing times. You have to admit, that's a bit crazy right there.)