It is possible to ejaculate without having an orgasm, just as it's possilbe to have an orgasm without ejaculating as when the ejaculate goes into the bladder instead of out the penis or after several ejaculations there is none left to spurt out. Or he's tantric and has trained himself to be able to orgasm without losing his erection.
Google is your friend. Google "ejaculation without orgasm" and you will find lots to read.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion