Redfin

When a male inserts his penis into his lady friend while she is on her period and that penis is then covered in the remnants of that monthly visitor blood. Having a redfin is not ideal and tends to only occur after a female's warning and the male just not giving a shit.

footnote: gay men - see chocolate covered banana

Dan wants to avoid a redfin when he already notices the "situation" after performing a jimmy jam with his lover.