The most important thing regarding butt play and we cannot stretch, or stress this enough is to start slow, be gentle, and use plenty of lubricants.
And if you want to experience it more than once, you better make sure that the first time doesn't end up a horror show for her and her beautiful behind.
For most guys, a tight asshole is not made for their cock, but since humans are an ingenious and curious species, we discovered early on that anal penetration can provide pleasures not only to the giving man but also to the receiving woman, if done right, of course! And after all, if there is such a thing as a male G-spot, then it is accessible via the anal sphincter.