I've gotten head from Pregnant Chicks twice (other than my ex-wife).

When I was in the P.I. I went to a Bar and was Playing Poker. One of the Guys suggested we play "Smiles" while playing poker. The Chick they chose was about I'd say five to seven months along. She was so talented I paid for a "Short Time" and let her complete the task, she was very nice, rubbing my shoulders and getting me drinks after that while I played Poker again.

The other time I was working at a GM Plant outside Toronto (Oshawa?) and there was a hotel next to plant with a Strip Joint. Went in for a cold one and one of the girls serving girls was knocked up, probably seven or eight months along. She told me for a $20 Tip (Canadian hehehe) she'd show her appreciation. She told me to finish my beer and go to the last stall in the restroom in about 20 minutes.
There she was, had a towel rolled up on the floor to cushion her knees and her top pulled down below her tits.
She had like baby-wipes that she used to clean me up with first, then she went to town.

Obviously Britney's next career choice is Porn.