..Is notably absent amongst middle-aged dubs.
Maybe the Joy Of Sex was forbidden to them?
Take a peek at the Nov 1964 WT study:
>>The male sex organs and the female sex organs were to cooperate in fulfilling this God-given command. Thus the sex organs are not playthings to have a lot of fun with, for such fun does not serve the divine purpose. It results in injury not alone to the sex organs but to the whole individual who tries to have fun in this way. The sex organs, rather than being toys, serve a most serious purpose. For that reason the sex organs, male and female, have a sacred aspect or way of being looked at. They have to do with life, especially the life of a coming generation of humans.<<
Further on in this enlightening WT study we can see how the girls were encouraged:
>>Originally, legal marriage was the natural outlook that God set before men and women. Every human has the right to lead a clean life in anticipation of an honorable marriage. No person has the right to pollute his fellow creature who has such a God-given prerogative by forcing sexual immorality upon his fellow creature or by tempting him into it. No selfish person has a right to spoil the privilege and prospects of a fellow creature to an honorable, happy, healthy marriage. No one has a right to prevent another from having such a desirable marriage by misusing the sex organs or processes of that one. We should respect the bodies of other persons as well as our own. Hence no Christian girl should make herself like a public towel on which any man can wipe his hands by means of immorality. What self-respecting man who believes in health and hygiene would want to wipe his hand on a dirty public towel by marrying a girl who makes a harlot of herself, a prostitute? Girls, do not make yourselves a dirty towel for public use, available to the dirty hands of any whoremonger, any symbolic "dog."<<
..I wonder why JW's suffer from so much sexual guilt?
Beats me!
Englishman.