Full Mouth

The head nun wanted to find if her 3 nuns could fight temptations when it came to sex. So she put the three nuns in a room by themselves with naked man.

When she walks by the first door all she hears in moaning and screaming.

 When she walks by the second door she hears the same thing.

 But when she walks by the third door she hears nothing.

 So the next day she asks the nun "Why didnt I hear you having sex?"

The nun replies "My mom told me not to talk with my mouth full!"