More expression variety

So at this point, all we have are happy subjects, and there's nothing wrong with that but what about chicks that show that everybody's got a little canine in 'em when they cum? (All links are NSFW, BTW)

https://e621.net/post/show/905917/anthro-anus-blush-breasts-cat-chest_tuft-ejaculati

https://e621.net/post/show/890182/2016-anthro-anus-blue_hair-blush-breasts-brown_fur

<--Either howling or panting

Or what about the guys that clench their teeth? https://e621.net/post/show/1008467/anthro-armpits-balls-canine-clenched_teeth-coyote That's hot. Just sayin; there's room for tons more facial expressions above and beyond just pleasure and grimacing.