Hmm, ok. Swinging isn't group sex ;) It's partner swapping, not couples joing together.

Old people sex....I have seen that...damned internet.....

Trust me, don't go looking for it. Whatever you're thinking, it's far far far far far worse.

Give the guy the fork, the pain will distract him from what's burned in to his mind's eye.

As for the multiple partner/group sex scenario...that disgusts me on a whole level on its own, never mind the old people part.