Do you know any BDSM fics with skinny!Steve as the dom? I looked through your BDSM tag and I can't seem to find any with that particular dynamic. (It doesn't have to be preserum btw, modern au is also great!)
Here’s a few that I found.
A few weeks after he and Steve start fooling around, Bucky finally tries to go on that date with his dad’s secretary.
It doesn’t go quite as planned.
Steve has plans for the night. If Bucky can’t truly participate, then Steve will just have to get creative.
Their first date is objectively pretty great. But later, when Bucky comes after Steve slides inside him and slaps him on the ass, Steve knows this is going to be fun.
Steve wasn’t sore. He was irritated, and more than a little confused. He didn’t understand Bucky. He’d thrown himself at Steve while Steve was in rut a few weeks ago, and they’d literally spent days pretty much doing pretty much nothing but getting one another off and then dozing in each others arms. It had been nice, it had been affectionate, and maybe Steve was just a dumbass who thought that maybe that meant something (or maybe he was an alpha who became a bit too possessive when he found something he wanted to be his, but god, he hoped that wasn’t it). But apparently not.
Or ‘Steve wakes up to Bucky jerking off next to him in the middle of the night and porn ensues’.
And Here’s the search I used if you want to bookmark that for any more that might pop up! :)