Yes indeed!
Sex was "bad"! And of course, oral sex was the baddest of bad. Played it pretty much by the rules as a JW teenager. Even later (20's) would never go "all the way" because there was some rule about "penetration" prior to the definition of pornea being anything and everything sexual. Even after getting married had a bit of a hangup about oral sex (usually after one of those meeting parts condemning it). Most of us younger married guys joked about NOT getting involved in the "practice" of oral sex with our wives -- because we no longer needed more "practice". In fact. we were damn good at it.