i have a tiny little dick, and i've pumped for years. my job requires me to be on the road a lot, and i use my pump while driving. i want my cock bigger because i cruise all the rest areas, and vista points and other areas where truckers and horny motorists hang out, and hate the embarrassment of whipping out my tiny one. the hard, plastic cylinder was obviously too dangerous to use in the event of an accident, and was a little too visible to passing motorists, so i made my own. i used a curved piece of radiator hose instead of a plastic tube. they come in different diameters. i found a fluid extracting pump at an auto parts store ( it sucks fluid through a tube and deposits it into a small jar that screws onto the end of the pump.) the pump fit the radiator hose, just right, and i secured it with a hose clamp. when i used it, the suction would collapse the hose, so i wrapped the lower half with wire to reinforce the hose and that solved the problem. it works very well. it's soft and smooth and very comfortable to use while driving. i never wear underwear, so i just unzip, lube my cock with some hand cream, attach the pump, and pump away! an additional benefit is that the unreinforced section of the hose still tends to collapse around my cock, and it feels wonderful to rub my pumped up dick against the smooth walls of the hose, rather like a flesh light. it's big and smooth and black, and the curve hangs off the edge of the car seat, so it looks like a big, black cock hanging out of my pants! ( oops! my fetishes are showing! ) i'm sure my pump has confused a number of truckers who look down and see that big, black dick attached to a white boy!