When a gentleman wraps his dick in bacon and jerks off onto his lady companions back using the grease as lubrication. He then will let the lady eat the bacon, a treat in thanks for her troubles.
I was horny and she was hungry so we agreed on doing the bacon backstroke.
A reference to "Free! Eternal Summer", the sequel to " Free! Iwatobi Swim Club" Where when advertising the swim club, Makoto Tachibana announces when introducing himself, ( he is clearly nervous), that he " Has backstroke for days! And traps just as long". It became a meme for the fujoshi's who watch it.
Me: Makoto has backstroke for days, especially for Haru.
Other person: to bad Haru belongs to Rin
Me: FIGHT ME MAKOHARU FTW KYS RINHARU!