You put on the clothes. Hesitantly.
Everything goes on and seems to stretch comfortably to your breasts and groin. You watch as the panties and bra grow over your body until they mesh into a bodysuit. They continue on until the cover every inch of your body. After a few seconds, they suit falls off onto the floor. It reshapes itself into a pair of boxer shorts that the woman gingerly picks up.
"Nano-technology is impressive. Most people aren't aware it's everywhere. They used to call it the "Gray Goo Scenario". Too bad they never realized it actually occurred already. So, changing the form is easy. For us." The woman looks down at you. "So, J-Lo not our speed. But a woman?"
"Uh, no comment," you stammer.
"I was a guy once. Kind of a geek, too." She looks you over and then snaps her fingers. "You can either retry another woman or I can change you into a form I think you might like. It's a 30 day trial so this is your only freebie. Any other changes and we will charge you for them. It's $30 dollars now and $60 a month for a membership right now that allows any changes you want. Just tell me what you want."