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