Hubby and I love this toy to play with sensation and it can really get him from semi-erect to rock hard in just a few seconds. It is a bit awkward to use and we find it works a lot better with two sets of hands. You have to keep a finger over the release-valve in order to form the vaccum, but the pump is almost impossible to use with one hand. And don't let your man hog this, ladies - the suction can work just as well on your nipples and over a shaved labia and exposed clit. Enjoy!