This is a great way to get a guy to keep on going. I enjoyed using this product partly because it lasted for so long. The only potential problem I noticed is that the numbing agent can be transferred to the female if you don't wait long enough for it to be properly absorbed. Given that it doesn't take long to absorb, it's not a problem at all. This is a product that not only I enjoyed but my boyfriend enjoyed as well. Sometimes a few minutes is almost all we have. We used this one night and sleeping definitely got put on the back burner.