"Of course I won't laugh," said the provider. "I'm a professional.  In over 10+ years I've never
laughed at a client." Please show me what you're packing.

"Okay then," said Bob, and he proceeded to drop his trousers, revealing the smallest male part the lady had ever seen. In length and width was almost identical to a AAA battery.

Unable to control herself, the provider tried to stop a giggle, but it just came out. And then she started laughing at the fact that she was laughing.  
Feeling very badly that she had laughed at the man's part, she composed herself as well as she could.
 
"I am so sorry," she said.. "I don't know what came over me. On my honor as a provider and a lady, I promise. That won't happen again.
 
Now, tell me, what seems to be the problem?"

"I didn't want to see you because it's swollen", Bob replied.

She ran screaming out of the hotel room.