Great idea, Penn! You KNOW this is gonna break bad. Some idiot is going to think, "Hmm, if it feels good being above it, it's gonna feel GREAT being right on top of it!"
When air is blown or forced directly into a vagina without allowing any air to escape an air embolism (the abnormal presence of air in the cardiovascular system) could form, which can be fatal. Women who are more at risk for this unlikely possibility are those whose pelvic vessels are enlarged (meaning, increased blood supply to the vagina) due to a condition such as trauma and possibly pregnancy. So, if a very large amount of air were to be blown or forced into their vaginal canals, it's possible that the air could enter their bloodstream, causing a blockage in a blood vessel. As a result, some of these women, perhaps including the pregnant women's fetus, may experience complications. In extraordinary cases, some of these women (and the fetus) may die if the embolism travels to the heart or lungs.