You say things like "I'm flushing because I just cleaned it; not because I used it" and A) they believe you. And B) They laugh.
You call them crying and end the call laughing.
You talk about nothing just so you don't have to hang up.
You don't even send an e-mail or look at the phone and they still know that you need them.
You can do a million things while they are trying to talk to you and they don't care about the interruptions. As a matter of fact they are comfortable enough to interrupt you back.
Just wanted to say Thank You in a big, public, embarassing way. Thank you.