Bought and Paid For

This is set in an alternate reality where the super-rich can buy a real person to take as their sexual partner.
Companies such as Bios hire/buy real people and then surgically and emotionally alter them to suit the customer's preferences.
These whores enter into a life-long contract with their owners, and earn huge amounts of money for their families, or their retirement.

But what kind of person would choose to buy no-limits sex like this? Someone who intends to get exactly what he wants. No matter the price.