back in college, my girlfriend bought "Enduranz".. her reason was she's just curious how do our ***** reacts and behaves under its effect.. so I did as she said, ako gi-tumar nya shot2 mi gamay ug Red Horse. after almost an hour nahurot na ang beer.. ako na feel kay ni-kusog akong sexual desire. kung sa atong pamulong, ga-biga kog kalit! (sorry sa term ako nagamit mga boss) hahaha! from what I've heard from some of my friends, lahi jd daw ang pure ****** kay as in erect jud daw kaayo ato-a nga muabot sa extent nga maka-feel naka ug pain. with Enduranz, para nako normal erection lang. like the usual erection, but mas mu-active jud ka... that includes napud nga bisag 10 or even 5 minutes pa lang after sa previous round. mu-erect napud balik.. since that day, I haven't tried using any of those kind of supplements. I'm 25 years old, so KUSOG pa si dodong. hahaha! But all in all, I guess mag-matter pud ni sa ato-ang immune system, so effects may vary on different individuals.