Well, now, that's a good measure of success.
A tip though: Once you're through with it, leave that thing alone. It can usually be re-stimulated back erect for several hours after use, so you don't want to be approaching the 4 hr. mark with an erection you can't or won't use. So leave that thing alone!!
James C. Age 63
Gonna Make Myself A Better Man tinyurl.com/28e8qcg
4/07: PSA 7.6, 7/07 Biopsy: 3 of 16 PCa, 5% involved, left lobe, GS6
9/07: Nerve Sparing
open RP, Path: pT2c, 110 gms., clear except:
Probable microscopic involvement-left apical margin -GS6
3 Years: PSA's .04 each test until 04/10-.06, 09/10-.09, 12/10-.09, 02/11-.08