I had mentioned in a previous post that I prefer to watch my wife and her lover (I really don't like using the word "bull") from the side. So to answer your question as to what I would like to see at the end, ........ from my viewpoint on the side, I would like to watch as her lover lays on top of her for a while after he drops his load inside her. They kiss intimately and lay in each other's arms with my wife stretching her legs out, completely satisfied. And her arms around his neck, or cupping both of his ass cheeks is a sight to behold.
When they slowly they come apart I get to see the juices on his cock and the cum starting to leak out of her pussy. This, to me, is the ultimate conclusion to a perfect night ....... for them. As for me, my enjoyment was watching a very erotic scene and my wife getting sexually satisfied.
Sometimes I get invited into the bed with them while her lover recuperates for perhaps another session.
For what it's worth, ...... the term "Bull" reminds me of a guy who dives into a pussy, goes "wham, bam, thank you Mam" and leaves, having satisfied himself and wouldn't care less if the woman orgasmed or not. A lover is much more considerate.