>>11347997
Love this idea.
So what if Magic in this setting is inherently feminizing? With aptitude being based on emotional intensity over intellect. As Elves are generally immortal and eternally youthful, all Elven males would just grow bustier and more voluptuous with age and as their magical skill grows. It would get to the point of there being 1000+ year old Elven sorcerers with god-like powers and Hyper-Venus bodies.

This would also explain their declining birth-rates. As their bodies grow more feminine, their male genitals would wither away until there's nothing left but the tiny hole of their foreskin nestled in a vulva-like cleft of crotch fat. As their testicles have basically been absorbed into their groin, they've become more or less impotent with their cum being a loose and translucent fluid no different from a woman's squirt, thus making reproduction nigh-impossible.

However, these busty male Elves still find themselves incredibly horny. With not much left of their male genitals, they pursue pleasure through their anus and sensitive nipples. And even if they lack wombs, the estrogen-like effects of magic has made them a tad baby-crazy. Constantly seeking to get bred by the more masculine males of other races.