If you think Mary had sex, then you do not believe in God. So what do you bel8eve in? Read up on anatomy and tell me how we randomly happened, and why we randomly happened how we did, and what happened to the failed random happenings, or why there arent random happenings slightly different in terms of things like tendon composition or muscle construction and activation.

Its honestly a lot easier to believe that a God created us that I cant see, then dice were rolled 10^150 times to create everything you see.