Pretty lazy. It's just a one-second loop over and over. Would've been better posted as an animated .gif instead. It doesn't matter a whole lot, but I can also clearly see how the hand is a drawing dragged around and it clashes a lot with the actual animation going on above.

This might be the first time I've seen somebody draw/animate that kind of innie nipple. I LIKE. Everything's good and also funny and I really appreciate you not destroying her proportions with z-cup tits or anything dumb like that that so many people do.

However, there are a few issues. The overblown lighting/exposure is too much. Also, The thrusting motion is a little weird. He's not moving much, but he's also pulling her and her body moves way more that direction than her head does. I'm pretty sure her head should move that way more. His fingers rotate too much too, when her leg isn't turning at all.

Everything about this is excellent except for a couple things. The breasts' loop is a bit stiff (I would've also made them go up and down so that the appropriate follow-through would enhance it). Also, when I notice her hands are simply mirrored, it looks kinda weak. A slight variation in position and timing would help a lot.

I also just noticed the same on her knees, except in their case one of the becomes anatomically incorrect because of it.

The man's mirrored too, but who cares :P