when a girl, advisably one you have an amicable relationship with, gets into a situation where one may presume she is aroused to the point of wetness, leaking if you will, it is necessary to let everyone know of this by yelling "call the plumber"
Situation 1: Guys, I think Charlotte's leaking, I better call the plumber
Situation 2: Have you seen how wet that girl is just looking at the doughnut? She needs to call the plumber
Buy a
call the plumber
mug!