Had an older daddy that would make me do this only because I would cum way too soon if he didn’t make me cum before I felt his cock inside me. So he said might as well use your cum rather than lube if you’re going to nut so fast
This takes me back a few years. I had a live in partner who always liked me to fuck him using his own spunk for lube. He also loved me to remain inside him after I had cum. He would then massage my Cock with his sphincter and want fucking again. Ah! The Good Old Days.