Verified answer

Play video games better than him, watch half as much or more porn than he does, be unafraid to change clothes in front of him, beat him in a foot race, know more about sports than the average girl, don't be afraid to get dirty (like actual dirt or soil, not the other kind of "dirty"), don't get mad at "dirty" jokes or tell a "dirty" joke of your own, don't be afraid of your bodily functions (yeah, gross, but you asked), cook something very delicious for him without him asking you to do so, have enough knowledge about football that you can have a conversation about it as well as having a favorite team and knowing your team's current record, and just be smart.