all the fic I wanted to write but didn't

Any monster/beast version of Dean fucking the daylights out of human Sammy. Bonus for Dean with a huge cock, impossible amounts of come, belly bulging, and large size difference.

Switch it up to monster!Sam, because bottom!Dean.

Why is Sam a monster? Is it temporary? Established relationship?

A spell or a curse. Yes. Yes.

Maybe he's a moose/minotaur. Or a big scaly thing. Or an actual giant. Sounds like this might be early Rowena shit.

So yes it's temporary. It'll wear off. But in the meantime the boys are getting antsy w/o sex. Or Sam wants to fuck and Dean can't put him off any longer.

Post-MoC. Season-Amara. Rowena slows the boys down by turning Sam into an actual giant. Which we haven't seen in canon so free reign.

Crowley tells Dean it'll wear off after a week or so. Dean goes home. Sam fucks him and its all of the things in the prompt.

Actually, Dean brings Crowley to the bunker. Crowley says he's a giant. Dean says yeah we know he's big but what is he. Crowley says he's an actual giant. My mother turned him into an actual giant.