

Ohh wait that is even worse of a question. So it really is: “Why do Atheists believe the words of their mother about their father?”
My answer to that: I am again more inclined to believe my caring and trustworthy mother than any book.
It is still a weird religious bait and i am not sure we understand the question of OP due to language barrier.

Don’t do it.
I was cut for medical reasons but i wish the had tried an incision instead. My parents however were the bunch that thought the foreskin is worthless stuff because god commanded the jews to cut it (and god is always right). I remember the pain to this day. You will also steal pleasure from you son.