Marital sex just needs to be varied. If the couple won't do it together, then clearly they will still do it secretly each separately! I think this home variation is acceptable, in any case it is not as extraordinary as entertaining a large group of swingers. My wife and I once invited me to one of these, against her this clip is just sex puritanical family!
Nearby are two young and quite ready for sex, and this to put it mildly weirdo jerks his dick with his hands in an attempt to raise it to a fighting position. Isn't that weird?