What causes a man to not ejaculate after becoming fully aroused and everything seems to be going fine?
There can be many reasons. Being tired, stress, both in general
and having to perform. Age. The biggest part of sex is in your
brain, so you may not be turned on by your partner as much as you
think you are. If you feel you climax without ejaculation there can
be a plumbing problem. Physical blockage. Bottom line is go to a
doctor and find out.