Why not call rape "natural" while you're at it? Was probably responsible for a great deal of people's lineages. There's lots of things you can call "natural".
As for a person condoning this mentality, it is impossible under scriptural conditions, even lusting after a woman is forbidden by Jesus, and by NT standards, even Paul in Romans 1:26 condemns a particular act of intercourse that is not "natural" (against nature in fact) and says specifically that the "men burned in lust for each other", though the verse is not likely condemning lesbianism but certain non-reproductive acts men and women do that ahem....you can get the idea. Let's just say "Natural" probably means the act which leads to babies and in ancient Israelite society, it was probably more repugnant than it seemed in the 50's.
So the answer is, "Christians" must in fact, indeed in fact, sell out and compromise the scripture, to condone an inclination of lust in such a way. What is an "inclination" any way? Is it anything other than lust?
There is no question that Lev 18 says "lies with a man as with a woman" as for the death penalty being applied, that's only for ancient Israelite society under a politically autonomous Sanhedrin of appointed Judges, but the idea remains that one will endure a providential fate instead. Some Rabbis have said it's about a "particular act" as well, but it can mean anything that a man does with a woman.
Yashua says its better to castrate oneself than to cause his wife to commit adultery (by remarrying). By this idea, one would imagine that Yashua wouldn't want one causing another to sin of equal forbiddence.
Thus, any "Christian" that anything more than "Tolerates" male behavior in such a way or even the particular inclination and regards it as acceptable, is against the "Spirit" of the scripture which flat out condemns male-male behavior in the harshest of terms.
Female-female behavior however, now that's another story. I'm all for it. If women would stick to each other instead of men, there''d be practically no STD's and unwanted pregnancies, and lots more virgins to court.