Thats just what cipralex/lexapro does. It was kind of cool for a while because I could last a really long time, but then it got annoying and it became increasingly harder to cum over time. Thats not why i got off it though, the suicidal ideation I got from escitalopram really fucked with my head. We are in no position to tell you what to do because we dont know your condition, but Im going to have to agree with the above posters in saying stay away from ssri's unless its absolutely necessary.