I agree here... it's more that she's offering it for YOU... and most guys are very visual (I know I am)

so the view and actions are far more stimulating than the actual feel of the hair on your cock.

And the more you (softly) mention what you'd like to SEE... the more she'll probably open up to you.

And she may also understand that at that moment... she absolutely OWNS you...

and it becomes stimulating for her also... a true win/win encounter....

Just my 2 cents..