I don’t often do romantic prompts, but that’s the one area that I really feel doesn’t get enough attention. This is my attempt at one, day. You don’t have to write romance, of course! There are options.
If you want to write romance, write a scene where either of the two man characters either thinks about or says something about this to the other. I’m sure you can find a way to work it out somehow, and make it way more romantic than I just did.
If romance isn’t really your thing, write a memory about the prompt. It doesn’t have to be about a lover… it can really be anything that you can think of. A car? The mothership?
Have fun with it!