Sure!

You're still relatively new to this whole selling your body for sex thing, but you figure this can't be that bad. And think about all that gold! You tell the wizard you'd be happy to help with her tests.

"Great, come with me." She leads you through the rear door, then down a long set of stairs. You end up in a low-ceilinged room, its walls made of rough-hewn stone, lit by orbs of floating light suspended from the ceiling. There's a circle inset on the floor, rings of gold and silver, inlaid with gems and twisting upon themselves like knots, forming symbols that hurt your eyes to look at for too long. The space inside the circle is maybe seven feet in diameter, a bit beyond your outstretched arms.

"Go, stand in the center, you'll be joined by your partner. Your payment is here." She reaches into her robe, and retrieves a sack, setting it on the floor by her feet with a heavy sounding clink.

"Now, since you were kind enough to volunteer, I'll give you a choice of which creature you will lie with. What would you prefer?"