And wow! Really. My w has had a lifelong problem with reaching the big o, and only recently has she achieved a "real orgasm".
So the other night she took one of the free samples that I got from my check-up. Wow, she had at least 5 major orgasms--she was exhausted. The next day, she was still in an "excited" state.
Now I know that viagra isn't supposed to be effective in cases of psychological sexual dysfunction (or supposed to be taken by women for that matter), and my wife's sexual dysfunction is almost certainly psycho. Related (depression), but what can I say--it worked in a big way.