Americans still deal with a great deal of Puritanical shame around sex, I think, and as a very fat country (the fattest ever to exist) where huge numbers are on SSRIs (with sexual side-effects) plus a divisive political climate, you get Disney Marvel sexuality.
BTW if you think Disney doesn't do horny, think again. I mean, look at the "love story" in any classic animated picture. She looks at him, thinks he's hot, he looks at her, he thinks she's hot, and it's on. In at least two cases (Sleeping Beauty and Snow White) that's "love's first kiss" that's given non-consentually -- and his transgression literally saves her life. The older I get the more I realize that this naive notion of what love is actually is the core of truth; the rest of what we add is risk mitigation. In big budget American cinema, the surest way to eliminate risk is to do exactly what they've done. They aren't stupid.