Why are doctors so afraid of prescribing pleasure?
In my opinion, it's because, before WW1 they would, for a price, come round the house and exorcise the wife and rid her of excess anxieties etc. by causing her to release the pent-up vapours that are the result of not being able to ejaculate. These were released during "hysterical paroxysms", brought about by all manner of patented inventions that bear a striking resemblance to today's vibrators.
They were a bit embarrassed about that, pissing on your shoes and telling you its raining.
Anyway, the fundamental issue for me is one of liberty. I do not see a need nor a right to prohibit consenting adults in private from doing whatever they choose.