Airplane

A man and a woman were sitting beside each other in the first class section of a plane. 

The woman sneezed, took out a tissue, gently wiped her nose and then shuddered quite violently for 10 or 15 seconds.
 
The man went back to his reading.

A few minutes later, the woman sneezed again, took a tissue, gently wiped her nose and shuddered quite violently as before. The man was becoming more and more curious about the shuddering.
 
A few more minutes passed and the woman sneezed one more time. Again she took a tissue, gently wiped her nose and shuddered violently.
 
The man couldn't restrain his curiosity.  He turned to the woman and said, "You've sneezed three times, wiped your nose with a tissue, then shuddered violently! Are you all right?"
 
"I'm sorry if I disturbed you," the woman replied, "I have a rare condition; when I sneeze, I have an orgasm."

The man was a little embarrassed but even more curious and said, "I've never heard of that before. What are you taking for it?"

The woman looked at him and said, "Pepper."