Well, here's a true story. My present partner's ex-husband was monstrously well endowed. They always needed lube for sex, and it always took quite a bit of time just for her to get him inside her. She never, ever, had an orgasm with him.
The first time she and I got close, she came within a few minutes! I was using just one finger, (four inches from knuckle to tip!) using the "come hither" stroke, slowly, gently. Then, when we got going with my "modest package", (to use TBoneSteak's, for him, ridiculously inappropriate term), I guess the curve of my dick just kept hitting that magic spot. She is the most orgasmic woman I've ever met. She just keeps cumming and cumming, over and over. It's a mega turn-on, and she gets very wet,which drives me wild.
It's all in the chemistry. Dare we mention love on this thread? And it's great when the right size meets the right receiver, whether big, small or middling.