Viagra
"I'm a married 45 yr old Australian male of good fitness and health (BMI=25). Although I probably wouldn't say I had erectile dysfunction, I found our sex life non-existent and found after only one very short 'round' I just couldn't get it up again.

After taking Viagra - AMAZING. It was like my body was 18 yrs old again. First erection after ~50minutes from taking the pill and the erections of steel easily lasted about 8-10 hours. My wife does not know I have taken Viagra but was pleasantly shocked by about 6 'full on' rounds in bed in 10 hours! Yes I had mild side effects so I probably couldn't use it everyday. Mild headaches, sinus congestion and tiredness."