You can’t really compare real life people’s proportions to a cartoon of an anthropomorphic animal. To me its clear there was no intention for this image to be sexual at all. And believe me, if a furry wanted to draw something suggestive, there would be no discussion as to its horny status. They aren’t known for subtlety.
Are you just referring to the mechanic that lets you pick up other players? I wouldn’t quite call that riding.