Monogamists have sex for pleassure. Roger Staubach once remarked that he enjoybed sex as much as Joe Namath, he just did it with one person. The Neo-Platonic bent of Humanae Vitae is what offended married Catholics so deeply. That kind of asexualism needs to be rooted out of Catholic moral teaching, along with celibacy, sacred continence and ordaining only men. They are all fruit of the same bad tree.