[dkarbayev]

I've read that one of the positive sides of it is hygiene.

[mrslave]

If you cut off your arms will you no longer have to wash your armpits?

[saurik]

Someone did a great short story of a society where everyone got their fingernails removed for this reason (as an analogy to circumcision).

[benibela]

Apparently, in the UK many people used to have their teeth removed when marrying.

[gambiting]

Not just UK , and not just when marrying. If you could afford it, removing all your teeth before 30 was a great idea, since a rotting tooth and the subsequent infection would most likely kill you. So it just increased your chances.

[alpaca128]

Washing regularly also helps hygiene. As a bonus it doesn't require cutting off a body part according to the suggestions of a fairy tale.

Circumcision for hygiene is a bit like shaving your whole head so you don't need to use shampoo(Edit: with the difference that hair can actually grow back and doesn't have countless sensitive nerve endings).