because it's an underexplored niche. anal in real life requires prep and experience, animated porn should cater to sex acts that are unlikely/improbable. anal also represents a much bigger challenge, it's more intense for the recipient, more mindfucking. it's also more perverted and degrading. it's way hotter to see even animated girls take on something far more challenging and deviant. it activates my imagination way more, any girl can take it in the pussy, like duh, of course they can. seeing girls from games get fucked is exciting, it's fun to imagine them being sluts, but it's hardly pushing any limits if it's just vaginal all the time. being slutty doesn't just stop at 'normal' sex; they're fucking aliens and monsters, the least they can do is put it in their butt as well. 90% of female penetrative porn, animated or otherwise, is vaginal. that's why the demand for anal is so high, the subgenre needs to be expanded. there is plenty of vaginal stuff for you to go out and enjoy. people proclaiming their preference for pussy over anal is now JUST as annoying as people begging for anal, myself included. relax brother. everything is fine.