Ejaculation
When a man ejaculates before he wants to, this is called premature ejaculation. If a man cannot ejaculate after having been aroused for a long time, even though he wants to, this is called delayed ejaculation or anorgasmia. A man who is unable to ejaculate at all is said to have anejaculation.  Some men are able to have an orgasm without ejaculating. This is called a dry orgasm.