There is nothing like seeing another man's cock disappear into your wife, and then coming out wet and back in again. And then the string of cum stretching between his dick and her opening when he's done and pulls out, and she looks over at you with a sweet, naughty smile, leaving her legs open for you to enjoy first the view, and then the feel of her freshly filled pussy.
Agreed. My wife always insists that men must cum deep inside her hungry vagina and to keep fucking her when they've cum. Then their cock softens and flops out - wet and shiny coated in a mixture of his own semen and her vaginal saliva which i suck and then it's my turn to fuck her enjoying her slippery gooey vagina.