Masturbation in Showers

When you randomly search on web,

you will find several pictures showing the following notices posted in University halls of residence.

Based on the statistics, a lot of college boys masturbate in showers,

and it shows that male semen can choke the drains.

So you know why your shower drains are blocked now!

And there is one common advice in these notices:

Please Masturbate in Your Own Rooms! It is more comfortable!!!