Frank was too much of a gentleman to help his best friend, you, cheat on your partner.

I mean, well... he just wasn't like that, right? Like, Frank was a big cuddly bear who probably thinks girls have cooties still. Most people doubt he's ever had his first kiss, if we're being brutally honest.... he might be afraid of girls.

But, after he saw your partner mistreating you, he knew he needed to show you how a real, ~6'4 teddy bear~ I mean, a man, should treat you. Most of the night was a blur, but somehow he, the Praetor of Camp Jupiter, now has you pressed against your own locked door of your barracks, slowly kissing you while your partner is in the other room.

Oops.