I find your dick will accept the vacuum presure, if you are applying heat while pumping. Last night, I had a bath, soaked for about 10min, pumped for 10 min @ 5-8hg, massaged, pumped again for 10min, warm down, bingo, I had a nice 1.75 pump.Came out of the tube, at 7.6el, and 5.375eg, my wife...