It took my a month to see this but i used to be really into them. I just think Steve switching from this tiny little thing that Bucky would always have to protect to a buff man who was actually taller and stronger than Bucky,,,, it would do things to a man. A size kink fic that showed the before/after would be AMAZING. Bucky loving to take care of Steve when he was smaller, being so gentle and soft, basically a pleasure top because he just loved making Steve’s face twist up and having him make those sweet sweet noises.
And then its the 21st century and Steve can hold him down and fuck him like no one else can and it’s addicting, it has a good kind of fog creeping into Bucky’s brain and threatening to never leave. Suddenly its Steve’s turn to wring pleasure from him. While before Bucky really loved edging Steve,, now Steve really loves making Bucky cum until he can’t take it anymore - and with the soldier serum he can TAKE IT.
I also may be a but dumb and missing something i dont know what the second half of this retro means.