Multi-Orgasmic Guy

Just curious if anyone else has experience this: My current boyfriend rarely ejaculates and claims to go several weeks without doing so but still has multiple orgasms during sex.
I've experience him having three or four in one session and they seem to be very similar to mine in that they hit him like a wave over this whole body. He tells me it's a skill he learned over time and that he's had as many as eight orgasms during 1 1/2 hours of masturbation.
He says this method leaves him more satisfied with a better energy level. Plus, he can really do me almost indefinitely.