When I was younger and emptying the bathwater after a long soak I use to stick my mickey in the plug hole :o
The suction was lovely and the water whirling around my knob was something else :D
Special towards the end when it was nearly empty it kinda sounded like the plug hole was gagging on my cock:eek:
Now I reckon I got this idea from previously trying the hoover maneuver :)
In fairness I stuck it inot anything I could at that age but whats the weirdest place you've stuck yours:confused: