I’d be very cautious about that statistic. You can literally find any number you want on this topic across a range of 4% to 40%. I’m (M late 40’s) not a researcher, but I can tell you from my own healthy personal experience, the 4% number you quoted is VERY low compared to my own observations**.

*Caveat: The lower numbers probably DO directionally reflect the overall knowledge or effort contributed by men towards MUTUAL pleasure for both parties. Translation, most women I’ve sleep with tell me most* of the men they slept with were either sexually lazy, sexually uneducated, sexually selfish, or some combo of the above.

Additionally, women bear a disproportionate burden for the longer-term impacts associated with sex. Pregnancy, peer shaming, long term consequences from STD, and very real ongoing physical and hormonal reactions from contraceptives. And that can really squash the mood for them. (And we’ve not even tackled the BIG issues like trauma.)

My point is this. If your girlfriend is healthy and enthusiastic and positively reactive and generous sexually, be proud WITH her and worry less about whether anything is wrong with her. She’s sounds pretty amazing and that’s all that should matter.