I think there is more at play than merely the ascetics. Orcs are the racial embodiment of physical power. Dominating a girl is fun, but the power-play dynamic is accentuated when it is a muscle-girl. Similarly, elves are the racial embodiment of nobility, which is power of the social variety, rather than the physical. Some level of our brains is thinking "princess/queen", when an elf is involved, because that is what elves were created to represent by Tolkien (which extends to the "fantasy genre" broadly, now.)
I would say that the dev is at least somewhat aware of these dynamics, since the personalities of the characters in question seem to play directly into their respective niches, which only augments the psychological impact of the fantasy.