I have a fat (no offense, he knows his body build) gay friend and he uses dildos to prep himself whenever he gets fucked. So in my understanding, buffed ppl have more muscles. In this manga, Anton is really buff so will his butt be. He is full of muscles and those are rock hard so it makes sense why he needs to stretch his anus open, it's to relax the muscles so that when pressured is applied, it won't stiffen and probably break Julius' dick (๑•ㅂ•)و✧
Depends on how long you know each other, really. I've known him since elementary and we're 4th yr college students now. Since he's gay n active in sex whilst I'm a BL reader, R18 stuff is a norm conversation at times ╮( ̄▽ ̄)╭. I ask him for book plot references, he answers me w/ his experience so yeh... we're pretty close (≧∀≦)
I can't get over how Julius's dick changes girth between 3 panels, goes thin, thick, thin. I'm not mad, just confused, I don't know why Anton would be keeping a massive toy in him if he didn't need to? Still happy with the ending regardless.