We do this pretty regularly with a guy we know.
I wouldn't say my wife "takes a load" from him but that's what happens I guess.
I do enjoy watching them together, several positions, lots of kissing, lots of moaning and grunting.
Watching him change positions, he likes her on her back, we all know he's ready to give it to her. He starts to really fuck her, she's WAY into it. He's going at it, he always announces he close, he starts to grunt and cums. Very very very hot to watch.
There's more to it than seeing her "take a load" from him.