Thigh boob
The inner thigh region from crotch to mid thigh that is generally a wonderful place to touch, squeeze, or have your head buried buried between. Under optimal conditions it is soft, and smooth as well as a semi erogenous zone feeling quite similar to a woman's breast.
I love going for a drive and reaching over and resting my hand on my woman's thigh boob...much more driver friendly and discreet than grabbing a real boob while driving.