Scientists most recently studied this phenomenon in 2002, with the Institute of Under Studies spearheading the effort. Several causes were definitely identified, and other causative theories put forth for consideration.
mass related cracks
![[Linked Image]](http://i120.photobucket.com/albums/o162/mikedeez84/buttcrack.jpg)
rough handling
![[Linked Image]](http://i211.photobucket.com/albums/bb29/lazybuttlee/ericasss018.jpg)
petite dimensions
![[Linked Image]](http://i171.photobucket.com/albums/u281/supergirl_H/1-13.jpg)
exposure to water
![[Linked Image]](http://i169.photobucket.com/albums/u213/checkdathoe/IMG_3961.jpg)
inadequate covering
![[Linked Image]](http://i75.photobucket.com/albums/i303/hoho_10/shortshorts.jpg)
![[Linked Image]](http://media.photobucket.com/user/mikedeez84/media/buttcrack.jpg.html)
![[Linked Image]](http://media.photobucket.com/user/lazybuttlee/media/ericasss018.jpg.html)
![[Linked Image]](http://media.photobucket.com/user/supergirl_H/media/1-13.jpg.html)
![[Linked Image]](http://media.photobucket.com/user/checkdathoe/media/IMG_3961.jpg.html)
![[Linked Image]](http://media.photobucket.com/user/hoho_10/media/shortshorts.jpg.html)
