As an older gentleman, I enjoy having a younger man insert his penis into my ass and fuck me until I feel him cumming in me and pumping his seed deep into my willing submissive body where I want it and it belongs.
That's how it's done: use the tight ass-pussy to push the hot, thick cock into the asshole that's ready for it. Again and again, pound the throbbing cock in and out of the tight ass-pussy. Then finally, with loud, horny moans, squirt the boiling semen into the willing ass-pussy. I always want to be fucked right away and I'm happy to hold my open ass-cunt out for your cock. Come here and fuck me good, loud and a lot...
That works too but usually it's the younger men with hard cocks eager to fuck and older men with cocks that no longer get hard enough to fuck another man's ass.