Is the correct way to have sex through the belly botton or what?

*read my most recent question for this to make sense!* well I told my mom that me&my boyfriend want to have babies. She was thrilled.( she wants to be a sexy grandma) and I asked her for tips to make my boyfriend preggers cause I read online licking his belly button would work AND IT DIDNT make him pop out a babie :/ and tips? Thank yaaa