Cumming inside someone is expected at least among the generation I grew up with, but some of the comments I read here would suggest this isn't a standard practice. For me, if my penis is inside another person's body, that's where I'm going to cum.
This video brings back so many good memories of getting fucked by my older sister's husband. This was his favorite position to fuck me because he loved hearing me grunt and moan every time he pushed his hard cock into me. it became my favorite position, because I loved feeling his naked hairy body pushing down against mine and he would whisper nasty things in my ear as his big man size cock thrusted in and out of me. He fucked me harder, faster, and deeper until he blasted a big load of cum inside me.