What one person refers to as being degenerate; is, what another might refer to as divine pleasure.
If nobody is being hurt by it (unless the participant/s so desire), then there's nothing wrong with it or in any way degeneracy.
Sex is supposed to be Divinely pleasurable, with the stress on the adverb Divinely, which means holy or sacred.
The sex that you initially imply "one person" regards as degenerate reflects the misconception of a prude or morally judgmental fanatic. The ignorant fanatic who hates the body and its natural functions doesn't know that all that God/Nature gives us in the body with its desires and emotions is pure, perfect and free of "evil", which only starts in the mind.
Your first statement is fine in the sense that the judgmental fanatic who fears sex, hating themself for their desires which if unchecked by moral power and choices could ruin their life, seeks to condemn the body and sex, so calling sex degenerate, which in itself it is not.
The normal non-fanatic who accepts sex as a gift of God sees sex as beautiful or Divine pleasure.
In the second sentence you don't specify what kind of "hurt" you're talking about. Your parenthesis seems to imply the perversely desired physical pain of BDSM, so I guess you're just speaking of physical pain or hurt. However, if one cannot imagine any hurt beyond the physical, then one is not conscious of the full range of "hurt", and therefore the "hurt" or violation that is emotional, mental and spiritual and VERY FREQUENTLY found in sex even in the so-called "holy institution" of "marriage", most of which are not sacred or spiritual at all, and therefore also most sex within marriage, however pleasurable it may be, is NOT Divine. Not made too clear, but I'm trying not to write a book here. The bottom line is if one does not understand the above, one will not know what I mean by "sexual degeneracy", which could be called "unholy or profane sex", the profane being that which demeans the sacred essence of a person or sacred angel of God.
Sex is not parallel to eating, and the reason billions get in serious trouble with it is because they think it is just that basic. What people don't know or are ignorant of can and does hurt them in a range of ways, even **** up their life (no pun intended) quite badly. One sacred purpose of sex is creating children. That higher purpose demanding responsibility is why God/Nature, in the Adam-Eve allegory, eternally damned the couple for their loveless sex. Love is the Divine aspect in the ideal Divinely pleasurable sex of two people who love and are committed to each other for life. When the Divine beauty of Love is absent from sex -- when it's just sex for the pleasure of sex analogous to eating -- that's where a world of "hurt" and bad karma comes to the participants in loveless sex. It does not matter if people consent to it, if they don't really love each other, sex is a seriously punishable sin.
No doubt clear as mud. Never mind.
My favorite "Nazi" fan here, maxdancona's first post was so stupid I voted it down from -2 to -3. But then it disappeared to me. Because I don't approve of that seeming censorship and I wanted the world to see it, I voted it back up to -2. When I could see it, then it became, as Uncle Trumpy says, "perfect".