It would be nice to think that sex is only between the ears but a long goes on between the legs too. Viagra turned me from a bottom into a versitle top. Oh my the first time I was able to slide my cock into a tight Thai ass.....oh my.....what where we talking about again? I've found 50mg works most of the time if I haven't eaten lately. On a full stomach 100mg may not work. I've also found I get a great hardon the next morning too. Of course if I lost some weight I probably wouldn't need the stuff as much.