Who is it who deems this or that vulgar? Your ego? Your social conditioning? Who is this who is thinking?
Womb as 'hell realm' is extreme - definitely sounds like pure Mahayana to me. I can see its application the way I can see commuting daily in a small car without air conditioning on a cramped hot freeway as a 'hell realm' as well... lots of being crunched and burnt. Again, the price of living, you get through it, you keep finding the way you need to move forward and suffer less. (this womb description was probably explained by a man
) ... am I the only woman posting in response to this? Perhaps the ladies of dharma wheel might have very different perceptions by the sheer having of wombs and intimate knowing of the monthly natural cycles as well as the natural housing for the very body you are using to post and find sex and birth processes eww with... 
The question is sex considered vulgar to Buddhists? I'd say it's whatever Buddhists are about sex. Which from this tiny posting sample population is not one thing at all.




