SpermFeedR- All, i can say is based on some personal experience, you are certainly correct. Encountered a mature lady that could orgasm once or twice while giving me a bj and she never touched her pussy during the process. She just got amazingly turned on by orally pleasing my cock.
Unreal oral skills. 2 great comments by her: " Are you ready to blow a load down my throat?" And, "I didn't lose any of it". Just simply a lady that guy will never forgot.