did i tuck correctly?

[Umiko]

i've been tucking for about a few months now and i still cant seem to get it right. i tried something new and its working but are the testes suppose to be showing on the surface?

[Seras]

I guess depending how fat you are you might notice the lumps after you push 'em up. I am mad skinny so I can notice np.

[Umiko]

ah so i am tucking right and i have a super skinny frame so i notice them popping out

[Umiko]

i've finally was able to get those things inside but i keep feeling them vibrate. is this something i should be worried about?