I would say 2 or 3. I'm counting those are full orgasms (with build-up and a an eyelid-fluttering white-light strong climax). Some women claim to have dozens of orgasms per sex session and I often question how they're counting them. There's lots of little peaks on the way up, but a real toe-curling orgasm is noticeably more intense.
I would agree on 2 or 3. Many times I have multiple orgasms that are actually 4 or 5 waves of increasing intensity culminating in a very intense climax. But is each wave actually an orgasm or just the build up to orgasm? I will count it is if they are not. So 2 or 3 intense orgasms in a session is wonderful!!
As for masturbation, that will depend on the amount of time I have, can be anywhere from 1 to 6+
I shoot for 2 or 3. Pun intended