My wife has said a couple of times that as I love watching a woman give a blowjob "to completion" so much,
and...
it would be preferable for her, that I should try it myself, and then maybe she'd let me watch her finish him off.
She can still make me cum in quickly, playing with my balls...
while she talks about indulging my fantasy of watching her take and swallow a mouthful from some lover(s).
No doubt, it would be less a fantasy if she'd let me do that, but for (not my fault) reasons it's always been a no.
It's even a little bit tempting, to get what I want, but the price for me so far, is too high. If you can do it, go for it