(Men’s genitals, man-on-man sex, lots of street talk about them, entirely unsuitable for kids and the sexually modest.)
The Merry Homomonth of May on my two male calendars for 2022: the Tom of Finland calendar (which is mostly free of naughty bits) in my living room, where visitors (I do have an occasional one) can see it; the Cocky Boys / CockyBoys / Cockyboys calendar (which is all about the naughty bits) stashed away in my bedroom, where it can be viewed from my bed and so can provide me with an inspirational penis boost as called for by the exigencies of the moment.
So, in order: the ToF, which turns out to be primarily (though not exclusively) about gay men’s nipples, or tits, as we usually call them (metonymically); and then three months of CockyBoy cocks (April through June).