A scientific study attempting to document natural, fully ejaculatory, multiple orgasms in an adult man was conducted at Rutgers University
in 1995. During the study, six fully ejaculatory orgasms were experienced in 36 minutes, with no apparent refractory period. Later, P. Haake et al. reported a single male producing multiple orgasms without elevated prolactin response."
So in any case, it looks like you're not the only one.