Had sex without a condom but no semen leaked out afterwards. does this mean he didn't ejaculate?

The realities of Sex: I am very skeptical of this situation. How do you know there was no leakage or pre-cum? And did your partner end the event without ejaculation? (that would be very unusual). I guess the myth you may be asking about is that if you did not leak semen out of your vagina there was no ejaculation and this is a false myth. It is absolutely possible for him to have ejaculated and the semen to stay.