THEN I surely OUGHT to be RESPONSIBLE enough ALSO to Practice "Abstinence" and/or "Monogamy" properly, too ... ???
Sorry, the problem here is that I do not buy into Paul's idea of sexual responsibility from 1 Corinthians 7:8-9. Paraphrasing a bit: Since I am an ugly misanthrope who isn't getting any, nobody else is going to get any either, and if they take the marriage route they better not enjoy that.
For me sexual responsibility involves radical respect for one's partner. That means no sex until both partners think it is a good idea. It means preventing pregnancy until again both partners think they are ready for the responsibility of raising children financially, emotionally, and with the social support including medical that constitutes responsible parenting. Preventing the possible transmission of STD's is usually not an issue if both partners have the same ideas about responsible sexuality. But if one has had irresponsible sex in the past that may be a consideration until medical testing confirms freedom from STDs.
This normally results in monogamy long before the monogamy is blessed by some church, but if the bond fails, as occasionally happens in spite of sexual bonding, it will happen early and before children are involved. Then the result will be serial monogamy usually on the second try.
Will it work for everybody? Of course not, but it works a lot better than denying the pair bonding efficacy of long term sexuality. And it works a lot better than trying to deny the stiffie. It seems that not even priests can do that reliably. As my favorite T-shirt says: Got a stiffie wear a Jiffy (brand condom.) The stiffie will win every time particularly if she or in some cases he is interested. It is called being mammalian.
People who've never HEARD of "Paul" still have The DUTY of Personal Responsibility, with or without a "Condom" ...
teilhard
And that personal responsibility may or may not include abstinence, monogamy, marriage, masturbation, porn, sex toys, prostitutes, homosexuality, and sundry other things the churches deplore for everybody but the preachers.
It does include radical respect for a partner, a partner capable of informed consent, and acceptance of responsibility for anything that is the result of the sex including STDs, psychological problems, and conception.