Absolute not. I mean some people draw nudes of their fursona and stuff that aren't meant to sexual. That would be mighty freakin' creepy if someone came to it. Even if it was an option that could be toggled on and off it kinda just enforces the idea that furries are fetishists instead of a geekdom not much different from western otaku. If you need to inform someone you were sexually gratified by their art I'm sure you can add that as a comment :)