ED is erectile dysfunction, Nailhead. Means people have trouble getting or maintaining an erection. That isn't the problem you're having. They used to term the condition you're experiencing "ejaculatory incompetence," but now they more commonly refer to it as "delayed ejaculation." Here are two links. It's fairly common.
MedlinePlus Medical Encyclopedia: Delayed ejaculation
Delayed ejaculation (retarded ejaculation)

Are you by any chance taking any sort of medications such as SSRI antidepressants? They're famous for causing that side-effect.