I haven't see this discussed. When I go down on my girl she has an orgasm and wants me to stop the licking. But she wants me to fuck her quickly because she has another orgasm from some other source. She says they are very different, one is inner and one is outer. Can anyone explain this?
My wife is exactly the same way as you described. She has a very intense orgasm when I go down on her or rub her clit during sex. After that she is spent for a minute and doesn't want to be touched but she is able to recover and then really wants to get fucked. Then she'll cum several more times during sex alone. But the orgasms or climaxes she has during sex are different, not quite as intense or long lasting, but she'll have several of them and sometimes within a minute of each other. I think its clear that women (at least some women) have different types of orgasms but I don't think there is a real scientific explanation or description.
Don't know what you consider young, she's 35. But sorry, I don't think she'd be cool with you watching lol. She's into girls and has been with several, including her best friend. But I don't think she would ever share me with another girl. I'm hoping maybe someday...