Reminds me of when I was with a twink and he showed me his. I said I had never seen an asshole up close so right there he spread his legs, bent over, and reached back and spread his cheeks. His butthole was like inches from my face
Notv really, imho. However, I'd prefer it was limited to usage describing the most prettiest of "rosebuds" placed between a pair of the softest, most feminine cheeks (unless you're a fatass, in which case having a big ass doesn't apply yo you when the REST OF YOU is big!)