You are spot on.
As a cuckold, I watched in amazement when some older bull fucked Christine in the ass.
He pulled his cock out and it had poop on it. I was embarrassed but he said that, "That's good...
That way you know it went in deep".
It also made her cum, so who could argue?
But he had me there for a reason. Before he began he told me he was, "Gonna put me to work".
I didn't know what a "scrub" or "scrub boy" was. We'll I found out soon enough.
"Open your mouth faggot!", he ordered.
I "polished his knob" as he called it, cleaning the filth that often collects behind the head.
Then I cleaned Christine's rosebud with my tongue, during which
I was rewarded by having her fart-out the cumload onto my face.
The older bull loved it. Even Christine started giggling after commenting
how gross & disgusting it was.