Thank you all, smartasses , for your comments. The theory behind that is that sexual arousal is supposed to give you a serotonin kick which may be similar to that produced by some drugs. I thought it is the abuse of that biochemical pathway that messes up the brain wiring in SUSCEPTIBLE individuals (i.e. not everybody using LSD ends up with with HPPD, so there must be a susceptibility issue).
This is nothing to do with religion and, by the way, I do have HPPD (not PMA) as defined in the recently published abstract in which differential diagnosis of HPPD vs PPD is established
However, it is relieving to have the statitistics you kindly provided with your answers becuase I can happily resume my wanking without remorse.
So, thanks again!
...and I'm posting another question right away.