Good completed sex is the most delightful feeling one can derive on this planet but it is also serious business and laughing is not appropriate. When seen, it jars; smiling with the lust of enjoyment or the anticipated orgasm is acceptable and if the male is doing his job then his partner is transported to another level or planet, however brief it may be. She hasn't time or space for frivolity!! As for this video, what a cascade of beauties but dare I say it, continuous sex without context can become boring - hey, did I really write that, am I going mad?
The wink she gives in the 3rd video i have had off my wife many many times while she is getting fucked or sucking on a cock, it is such a naughty wink and a great turn on.