Board Thread:Off Topic/@comment-27144409-20170705210718/@comment-24534644-20170709215835

Normally I'd say any complete additional limbs are too far, but then tails are a thing. Though, to be fair, humans are from the same family as monkeys, who have tails, so it's not too far fetched to say a human-based creature could have one, even if it isn't an actual monkey tail.

Additional legs, however, would be a bit too weird. Bear in mind, once you open the door for something like that, you might as well also open the door for things like tentacle limbs and exoskeletons.