From What to Expect When You're Expecting*:

Cunnilingus is safe throughout pregnancy, as long as your mate takes care not to BLOW AIR INTO your vagina. [emphasis mine]

Please tell me this alarms you as much as it does me. Luckily for me, no one has ever needed this instruction (with child or not) and I hope that you ladies never have to resort to telling a guy you are not a balloon, either.

PS: I am not pregnant. I can't help but pick up this book when I see it lying around. It's so fascinating and alarming! Full of things I never wanted to know and yet want to be prepared for, should they ever happen to me!