There's a little hole in the crotch of my red velvet stretchy leggings, and it makes pumping my belly up from smooth and flat to round and tight that much easier! Watch me thread the tube through the hole in my leggings into my cute, tight butt and then plug in my automatic aquarium pump, taking as much air as I can and rubbing my firm, swollen belly after I can't hold anymore. It feels so good to stretch like this and my belly looks so cute and sexy all spherical like this!