You would think that this place of such pleasure and relief would be a safe place.  It's actually more dangerous than you think.  Slips and falls are common.  Here is what the CDC says in a report published in 2008:

For ages 15 and older, non-fatal bathroom accidents were at 21 million in 2008!

“Injury rates increased with age, especially those that occurred on or near the toilet, which increased from 4.1 per 100,000 among persons aged 15--24 years to 266.6 among persons aged ≥85 years. Injuries occurring in or around the tub or shower also increased markedly, from 49.7 per 100,000 among persons aged 15--24 years to 200.2 among persons aged ≥85 years. Within each 10-year age category, the relative proportion of injuries differed by location within the bathroom. The proportion of injuries in or around the tub or shower was highest among persons aged 15--24 years (84.5%) and lowest among persons aged ≥85 years (38.9%), whereas the proportion of injuries that happened on or near the toilet was lowest among persons aged 15--24 years (7.0%) and highest among persons aged ≥85 years (51.7%). “

http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6022a1.htm