One of the greatest pieces of choreography is MP's The Meaning of Life is the the song, Every sperm is sacred.  I think you missed their spoof, though.
I don't think your many are concerned about pride of masturbation as its pleasure. As Woody Allen said, when I masturbate I make love w. a friend.
No "Joy of Sex" manuals in the RCC.  Instead, there were penitential manuals that delved into a multitude of what the RCC deemed "sexual sins." 
The RCC was more Puritan than the Puritans when it came to sex.  The Puritans, unlike the RCC, did not think sex a necessary evil.  Aquinas, begrudgingly, admitted there could be some pleasure in the sex act, but don't get carried away.
If one one didn't take pleasure in a sex act, it mitigated the punishment.
And the procreative organs aren't limited to procreative. They have at least dual purposes for relief.  "Inter feces et urinam nascimur." 
If women were involved in the beginning, the celibate corruption of sex wouldn't be.