So I've seen people talk about Bucky's breast milk as having some kind of super soldier healing power and I was thinking why not prompt about his dick?
Someone in Hydra discovers the power of eating his cum.
Do they milk him routinely for cum when he's out of cryo? Do they give him hormones to produce more? You could combine this with the 'endlessly producing cum' prompt from earlier, maybe even combine it with the milk prompt.
Maybe Hydra tries to milk Steve also...