You're the nerdy boy and your mother happens to be friends with the mother most popular girl at school she begins to worry that her reputation will be affected by your constant visits to her house - What if word gets out? What if you tell someone? So, she comes up with a plan. Every time you visit, she’s going to kick you in the balls - that way, you surely won’t tell anyone, and if it does get out, she can say you come round and beg to be bullied - then she can maintain her reputation, and you look like a loser! Everyone wins!