# \[super TMI!\]What causes perianal brownness **URL:** \ **Category:** Factual Questions\ **Created:** [March 21, 2005, 4:41am UTC](https://boards.straightdope.com/t/super-tmi-what-causes-perianal-brownness/295516 "2005-03-21T04:41:19Z")\ **Posts on this page:** 3\ **Page:** 2
**Author:** ![CynicalGabe](https://avatars.discourse-cdn.com/v4/letter/c/3e96dc/32.png) [@CynicalGabe](https://boards.straightdope.com/u/CynicalGabe)\ **Post date:** [March 22, 2005, 4:33pm UTC](https://boards.straightdope.com/t/super-tmi-what-causes-perianal-brownness/295516/21 "2005-03-22T16:33:00Z")
> [@Fear Itself](#): > > The only way the testicles could be exposed to UV rays is if you walked on your hands in a nudist colony. Milk hurts when it goes out your nose. ---
**Author:** ![GargoyleWB](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/gargoylewb/32/199_2.png) [@GargoyleWB](https://boards.straightdope.com/u/GargoyleWB)\ **Post date:** [March 22, 2005, 6:51pm UTC](https://boards.straightdope.com/t/super-tmi-what-causes-perianal-brownness/295516/22 "2005-03-22T18:51:14Z")
> [@Fear Itself](#): > > The only way the testicles could be exposed to UV rays is if you walked on your hands in a nudist colony. Snow and water are quite reflective of UV, so I would think that nude snowboarders might also have a cause for concern. ---
**Author:** ![Snickers](https://avatars.discourse-cdn.com/v4/letter/s/5daacb/32.png) [@Snickers](https://boards.straightdope.com/u/Snickers)\ **Post date:** [March 22, 2005, 7:18pm UTC](https://boards.straightdope.com/t/super-tmi-what-causes-perianal-brownness/295516/23 "2005-03-22T19:18:07Z")
Maybe the coloring is due to more capillaries being located there. I mean, isn’t that why our lips are pink - because there’s more capillaries and more blood flow to that region than in the surrounding skin? Last I looked (which was longer ago than you’re thinking), my bunghole wasn’t brown so much as a darkish pink. But I’m very fair - perhaps it differs with skin tone. [Previous page](https://boards.straightdope.com/t/super-tmi-what-causes-perianal-brownness/295516.md?page=1)