Linda (who isn't the only one who's dating herself by revelations about when she went to school), Yes, it rings a bell and it's called air emboli. As a childbirth educator I first learned about it in the mid 70's at a conference about sex in pregnancy given by the Society for the Scientific Study of Sex. It is potentially fatal and expectant parents are advised NOT to blow air forcefully into the vagina. Just spoke with my son (a human sexuality educator) who says Quad S is still active, and holds annual conferences. In grad school this was stressed as a dangerous sexual practice. So, no, your teacher wasn't nuts...As far as I know....<grin> Here's a reference he had on it: Author: Hill-B-F. Jones-J-S. Title: Venous air embolism following orogenital sex during pregnancy. Source: Am-J-Emerg-Med. 1993 Mar. 11(2). P 155-7. Abstract: Venous air embolism is an infrequent complication of pregnancy but may occur if air is blown into the vagina during orogenital sex. Air passes beneath the fetal membranes and into the circulation of the subplacental sinuses, invariably causing death to both mother and fetus within minutes. Reported is the case of a nonfatal air embolism following vaginal air insufflation in the 38th week of pregnancy. The hospital course was complicated by hypotension, metabolic acidosis, acute neurologic changes, and emergency caesarean section with eventual fetal demise. Clinical and laboratory abnormalities as well as treatment measures are discussed. Familiarity with this syndrome is essential if prompt and appropriate therapy is to be rendered. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Joyce Blangiardo RN, FACCE, IBCLC