in "deep throat" one guy is fucking linda lovelace's friends pussy while another guy is under them licking her ass....his face is like 2 inches away from the other guys cock.
in "the devil in miss jones" two guys are DP ing the main star and she tells them how it feels to have both of them in her....then asks them if they can feel each others cocks and they say YES and then the top one cums on the other...maybe by mistake.....alot of these classic vids seem like the guys didnt mind that much about touching cocks or being touched.....but that was back in the glorious 70's and 80's.
of course any creampie vid where 50 guys fuck her....there is alot of cum mixing in that pussy.....thats always hot for me.