I don't remember quite why he gave it to me, but my uro gave me a 'script for a generic version of Revatio, the version of sildenafil for pulmonary hypertension (20mg.). Initially, I didn't find it very useful, but then I started stacking 10 mg. of levitra and one Revatio. OMFG - I was 18 again!!! Levitra is good because it feels more natural then viagra or cialis .... you have more sensation. Spiking it with 20 mg of sildenafil gives you Levitra on steroids. Wonderful combination.
I didn't used to tolerate sildenafil very well. The next day it gave me pounding headaches and I felt very sleepy. I also didn't like the erection quality - extremely stiff, kind of painful, reduced sensation. But all that went away, for some reason. I love my blue pills now. Perfectly natural erections, good sensitivity - a wonder drug.
Those silicone cock rings are just great for boosting an erection and helping it last. They are my favorite sex toy.
I played with a guy recently who had a leather thong wrapped tightly around his balls and the base of his dick. He stayed rock-hard.