You are. As males age, the volume and power of the ejaculate decreases. You may be pumping out too little to become really noticeable. Another possibility is "retrograde ejaculation" in which the semen goes back up into the bladder instead of out the urethra. This can be part of the prostate growth that leads to more than fifty percent of men having issues by their sixties.

If your body says you have had an orgasm, I can assure the woman will complain. She has to dispose of that stuff and if she does not receive it, less mess the next morning.

You may wish to discuss this with your doctor at the next appointment.