Set a fic in the BDSM universe (that's the one where everyone most people are either a Dom or a sub). Tony is, of course, a switch. All the historical documents call Steve Rogers a Dom, but, actually, it's a government coverup due to weird dynamics policies of 1940's. And anyone who actually meets Steve can see how he is totally a sub. (And if anyone tries anything with Steve, Tony *will* cut them.)
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everyonemost people are either a Dom or a sub). Tony is, of course, a switch. All the historical documents call Steve Rogers a Dom, but, actually, it's a government coverup due to weird dynamics policies of 1940's. And anyone who actually meets Steve can see how he is totally a sub. (And if anyone tries anything with Steve, Tony *will* cut them.)