>Run out of condoms a couple months ago
>Go with girlfriend to drug store
>Each buy a pack of condoms
>We alternate weekends at each others places and average sex once [er weekend so we should be going through condoms at roughly the same rate
>So each pack should last 4-5 months.
>She finished her 12 pack of condoms last week. I still have 8 left.

Guys this math isn't mathing. Help me out.