They are best used for their tongues

"Elsa," I address the naked blonde girl that's scrubbing my back, "Your sister's not quite getting it. Could you help her clean me down there?"

The dumb little twin bimbo drops to her knees just like her sister, water pouring down both their faces, and starts rubbing my black buttocks as if on command. I grin smugly.

"Your fingers aren't going to do it. You need to use your tongue, sexy girl."

Elsa giggles at being called sexy and tentatively pokes out her tongue. At this point, I flat out sit on her delicate blonde face. Whether she feels like it or not, she's going to be rimming my ass in the shower. Fortunately, she sticks out her tongue and starts licking my dark black hole with the minimum of fuss.

I'm enjoying her slender sister Inga's ball massage too, but it's time for her to do something a little more advanced.

"Inga," I talk down, "You'll have to use your tongue too."

The blonde girl obediently starts licking my balls which is rather nice, but I unceremoniously grab her head and impale her mouth on my giant black rod. Her neck visibly stretches when I go down her throat, which is always a sight to see on these thin white girls.

I facefuck her pretty roughly. Fortunately for her, she submits pretty quickly like a wise little white bimbo.

I hear the front door open. I need to wrap up pretty quickly in here and see who's home.