Mmmmphaaaarrrrrgagagagagahhhh
I found out the hard way why a particular gf never let me come in her mouth when during a otherwise satisfactory sixty nine I gave her a healthy throatful.

She ran gagging from the room to throw up. Turns out she was allergic to semen. I ended up driving her to hospital to get something for the swelling, costing her a day off work and me a week or two without as punishment.
( Udderbelly A tale of four titties, Fri 15 Jun 2007, 15:26, Reply)