I had to go with Snap, krackel, and pop.. Because my wife is still alive..
Its not a problem for me to please her at all..
I can get her off well over 90% of the time, she usually goes twice to my once..
It just depends on the girl.. Though, the guy has a lot to do with it. When there are really strong feelings between the 2 of you it usually makes it a lot easier to achieve the O. Well thats what I have experienced most of the time anyway.