How come people dont refer to a restroom as a lavatory anymore?

Question

How come people dont refer to a restroom as a lavatory anymore?
Lavatory was powerful. When somebody says, quotHey man, I am gonna go use the lavatory,quot it makes a person think, quotDamn, he is gonna go use the laboratory. And hes gonna mix chemicals around with his urine or feces and make a new drug that can cure cancer or something.quot Yeah, lavatory really needs to make a comeback.

Answer

I use it all the time...the lavatory that is. Its a great place to find the cure for cancer. Or at least ponder about it. Who are you? You made me laugh!