Her backdoor. With some warranties.

I analyzed this situation. I let a complete stranger into a small room with me, and all I had on was lingerie. Maybe subconsciously I really did want this. Ben wasn't making the decision any easier on me as he once again put his hands on my waist, but this time he pulled me against him. I felt a bulge in his pants press against my ass, and my thoughts immediately went to my usual evening sexual fantasy about being taken from behind. I allowed a lot to my imaginary lover. I was actually considering to let this pervert take me in changing room!

“You don't have to fuck me.” Ben sniffed my blonde hair as he ran his hands up and down my waist, coming dangerously close to my breasts. “Just give me a handy, or whatever you're comfortable with. I'm not paying for your clothes for nothing.”

With that, Ben removed his hands from me again. I slowly turned around and my eyes landed on his crotch. Some part of me wanted to have what was there, perhaps a need of semen to maintain the transformation wasn't the only side effect of the potion; It may also cause the person who drank it to physically crave the semen.

"You must have seduced a lot of young girls in a place like that making the same offer." I started to think how to get more from my desire.

"You said it like it's something bad." Smiled he back.

"How do you convince them that you won't just leave them in changing room and walk away?"

"I always paid what I've promised. I have some moral standards." Smiled he again. "It was never need in warranties before."

"It is now." Smiled you. Your thoughts started arranging in some deal. "What do we have here? Lingerie for $50. Jeans for $30. Skirt for $40 and tops for ... this ... and this... $60. $180 total. Do you want to pay it for just one handy from a pretty eighteen year old girl?"

"For handy from gorgeus eighteen year old girl in sexy lingerie in a changing room."

"Hmmm. Let's make it five hundred in advance." Said you. He raised his eyesbrows. "And I'll let you take me from the back... take me in the backdoor. With some conditions."

"What conditions?" Asked he when he got his jaw back. He looked really surprised. I bet he rarely got from his girls more than a blowjob.

"I'm a virgin there." Said I and smiled as his jaw dropped again. "I want you be very gentle."

"Absolutely."

"And we don't have gel here... So you would need to use a natural lubricant... a lot of it."

"What natural... Oh, I see." Said he and licked his lips.