M: So what's wrong with the drain?

W: It's clogged and water won't go down.

M: Let me take a look. You know why? It's clogged with hair. No wonder water won't go down.

W: Well, I guess people who lived here before didn't clean the bathtub.

M: You’re darn right!

W: What should I do now?

M: Don't worry, I’ve got some acid here. It will help dissolve the hair down there.

W: Ur, it stinks!

M: Now you know you have to clean your bathtub every time when you use it.