dybmh
דניאל יוסף בן מאיר הירש
I think you're arguing for the sake fo arguing here. Never means not a single event. Null, zero, none, etc... that's what i said."outside of marital life there can be no lawful or healthy use of the sex impulse" means it is never lawful or healthy. It is not referring to numbers.
Signs of spiritual unhealth are what is described in the psychology today article."Healthy" in the passage does not refer to physical health status. It refers to overall health, especially spiritual health.
"psyche tends to grow twisted into grotesque, enraged perversions of desire" - that's spiritual
"guilt shame and ignorant pride" - spiritual
"abuse of the spirit" - spiritual
The author if the article is a PHD.
If you want to refute this, you'll need something that describes spiritual harm from sex out of wedlock.