1) Have you ever had piss in your mouth?
Yes. A few times. Had a mixed piss once (mine + his).
2) Have you ever had someone saliva in mouth? (exclude kissing)
Yes. I don't like smoker's. Tried one time with phlegm. It grossed me out.
3) Have you ever had poo in mouth?
No.
4) Have you ever had sock in mouth?
Yes. It falls under punishment most of the time.
5) Have you ever had feet/toes in mouth?
Yes. Quite willingly suckle on his toes. 
6) Have you ever had panties in mouth?
Duh. It may be interesting to know some of it wasn't mine.
7) Have you ever licked a shoe sole?
No.