One of the biggest challenges in any sexual situation is making sure that everyone's got the same rhythm going—and that challenge just gets harder the more partners you throw in the mix.

So kudos to this foursome for managing to keep it on the beat. No matter what sexual activity they're engaging in, they always manage to keep together—even their moans seem in perfect harmony. We're not sure if they're lucky or talented; but whatever it is, we're totally in awe.

· Wife swapping anal foursome (pornhub.com)

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