You've never had much luck in dates, and you want to get close to a girl... like, really close. You want to be so close to someone, that you'd become a part of her. Be blended into her flesh, enhancing her body, and being entirely at her mercy... you're starting to get horny just by thinking about it, but you repress it and wait until it's your turn.
Later on, you're inside an office, with a woman who said she's going to be explaining the procedure and the preparations needed.
"Very well, Ms. Ylviosa, you picked one of our most polished and developed methods, and I assure you, that you won't be dissapointed." she says. "It's a delicate process, but with incredibly satisfying outcomes." She stops talking and takes out some papers.
"Now, it works like this. You can get transformed into any body part, except for eyes and brain. You can even be transformed into a liver, a heart, or a bone, although there aren't many people who desire to be transformed into these things. These transformations are somewhat permanent, and while your host is alive, you won't be able to be transformed back. If your host dies, you'd transform back and teleport to our place automatically, although that doesn't happens often... you know, our company made inmortability possible... there are very little mortals around in these days. So, if you're added to an inmortal person, you will never be able to change back. However, you can decide everything about your transformation: what will you feel, your senses, if you're able to interact with the world, how you want to be treated, if you have mobility... It's your decision. You can also choose the person that will receive you, you can even pick a random person who meets your criteria." she explains.
"That... sounds good." you say, a bit scared. "I want to be a girl's body part... I don't like guys."
"Alright, that's perfectly understandeable. Have you decided what you want to be transformed into?"
Of course you know. You want to be...