"Dildo"

You remember that Shari, the woman in the apartment next door to you, is always waking you up at weird hours with her masturbation. She's always buying new sex toys, and doesn't even try to hide what they are when she brings them in to the building.

You put the portal with your cock and balls sticking out in a box and walk over to her door. Shari answers the bell after a bit, wearing what appears to be only a thin bathrobe. Apparently you interrupted her as she was about to start another session of self-love.

"What do you want?" she snaps. She hasn't liked you all that much ever since you compared her IQ to her breast size. She took it as a compliment, until someone told her what "IQ" meant.

"I just designed something that I was hoping you could test for me," you say. As she opens her mouth to reply, you give her the line you know she won't refuse: "It's a sex toy."

Her eyes narraow. "You designed a sex toy?"

You smile. "It's a 100% true to life dildo. You won't be able to tell the difference between it and a real guy."

She hesitates, then takes the box. "Okay. I'll let you know how it works."

"You'll need this, too," you say, as you hand her a large disk. "It's the wireless transmitter. You'll want to put it on the wall accross from your bed." Actually, it's a polarized portal, the other end of which you are going to use to watch as she stuffs herself with your cock. Naturally, you aren't going to tell her that.

Shari takes the portal from you and shuts the door. You rush back to your own apartment, place the viewing portal on the ceiling, then situate yourself on your bed so that you can get a clear view.