"Who likes a certain length?
"
Tbf wife prefers girth to length. I’m average 7 inches not thin not massively thick but she says would rather do thick than long
Girthy 8 is the ideal. Can enjoy bigger if they have some flex. A massive one that’s like a steal rod can be uncomfortable in certain/most positions but I have had massive ones that have felt great because they’ve had a bit of “give”.
A big one that’s a bit spongy and bendy but still firm can feel awesome.
Basically it depends on the cock as much as the person receiving it.