Department 
Millard says:
I remember the first time a woman put her tongue in my ear. She did a little circle and ooooh … what a rush.
And that’s pretty much how all the erogenous zones make you feel. That’s what you’re looking for. The spot that gives your partner that rush, that tingling.
So whenever you do something that makes your partner suck in a breath, you’ve found it. That’s where you should pay attention.
