‘Way back when, I used to stick my dick into the hose of my Sears shop vac. I wasn’t thinking about enlargement then, just pleasurable sensation, and the shop vac did a good job. The large collapsible hose allowed the vacuum to build up slow enough that I could tell if it would be too much and take action to adjust it.
I wouldn’t try it with other vacuum cleaners, though. None are good approximations of what a pump and tube can do.
Hobby has the better idea for something to try.
Tex3
"Sadly, however, seconds after its launch, it undergoes SMEF, or Spontaneous Massive Existence Failure,and disappears." Douglas Adams