Righto, first impression of the flash are positive. Partially from a bias towards more rare content xP

Anyhow, sounds are rather good, potentially a tad bit... "squeaky" I guess? Could be toned down a little, considering she's just getting a handjob... well, least to what I can tell it tends to be a little more quiet xP But they are good. Noticed where you got the from, and personally don't mind. It's hard as fuck to get decent sound as said.

I'm just going to make a wild assumption that you're only the animator, not the artist as well? If so, will not make any feedback on the picture itself. (though, so far I think the artist got a good anatomy, partially considering they only show female junk, thus manage to be consistent x3 That, and they've both shown improvement, and done varied content.) Bar from the fact the vulva does sorta protrude a bit into the abdomen, it's outside of it's turf xP Otherwise everything looks rather neat imo. Impressed that you included winking as well, considering the angle.

As a whole it flows well imo. With a climax part somewhere in the loop, it would have made a very good "milking" flash. (thought I am fully aware that'd be hard to do with the tools given, thus I can't say much about it. At most a sort of "shudder" with shut eyes could have been done. Potentially teeth gritting too...) But for now it's just a very good "jerking off" flash, without a ending heh. It looks great imo. Especially compared to some other animations with a similar techniques. It's much less jerky or "stretchy". Trailing off here though, but yeah, good work. Probably rambled a tad bit much again.