How to improve karezza sex, if it feels worse than regular sex? [1]

My girlfriend and I are quite close romantically and sexually, and we have sex (the regular kind) usually two or three times a week (we are busy with commitments a lot of the time). We're both in our early 20's.

I can make my girlfriend orgasm a lot during sex. Maybe three or four times. I improved my sexual stamina by reading a lot of sex manuals on how to improve that aspect of my life, but it didn't feel right. Everytime i orgasmed myself (with or after the main ejaculation), i felt exhausted for the rest of the week. I can't work or study so well and i've been looking for a way out of my fatigue from multiple-orgasms for a while- which led me here a few months ago. But my experience after sex is in total contrast with my girl.

After i've given her incredibly powerful and frequent orgasms (afterwhich i have to change the soaked bedsheets), she spends the next couple of days floating around with an angelic smile and telling me in sweet little kitten purrs how much she loves me. Only to want more the next time we meet (which i happily gave her).

We tried karezza sex for about an hour and a half last week because i wanted to sustain our love and passion for each other (after two nights of cuddling naked and kissing with no sex). i remembered everything the author of this website wrote in their guide on how to do karezza sex.
Once we finished however, she went like her regular (or slightly more irritable) self and complained that it didn't satisfy her and that she didn't 'understand it'. She doesn't quite understand the whole concept of orgasms being harmful, or that they might harm our relationship. As far as she's concerned, the more pleasureable and orgasmic the sex, the better. If we substitute it for something less pleasureable, then there's no point in her eyes.

We're both willing to give it one more shot to see how it goes, but neither of us want to decrease our sexual satisfaction. I can tolerate my fatigue if it makes her sexually satisfied. I was just hoping there would be a way i could have it both ways.

Could you suggest anything i can do to improve my textbook style of karezza sex? I read a lot about full-body orgasms or valley orgasms, but i'm not so clear on what they are. If someone can tell me what they are and how i can learn these different type of orgasms (or provide some links that will teach me), i'll be very happy. She'll be visiting her parents this week. I want to learn how to do those orgasms on her, so by next week, i can amaze her with multiple 'full-body' orgasms. That would probably be just enough to convert her to karezza i'm sure

i look forward to hearing from everyone