I got this in the mail yesterday and just had to try it. As soon as I was able to, I shoved my cock inside and started pumping. And all I can say at this point, considering that I used it with lube only, is that it really does have a pretty good amount of suction to it and appears to be trying to make my penis bigger. But, I have yet to get with my boyfriend and try this out on him, seeing as how he has yet to get hard at all when we have been together in the past. I mean, don't get me wrong, he is great in bed. But, he could use a little help getting a hard on from time to time. But, hey, some of us get hard easier than others for some reason.