Practical demonstration

"Okay sure Hale. Anything for my cute little sister" you say, getting up, asking her to stand up too.

"Now the first part of this exercise is identification.We need to know what parts are what" you say, pulling your sister's shirt up and throwing it to the floor, you do the same to her jeans too.

You can't help but freeze for a moment. Your sister's body is Gorgeous. Her boobs are small, but supple. She's the only girl you've met so far with no pubic hair. Her body is super skinny. You can't wait to teach her some more.

"Hey bro, could you tell me the names of the parts? " she mumbles

"Sure sure sis, let's not get ahead of ourselves." you throw your shirt and boxers on to the floor as well.

"When examining a coin, give attention to both sides of the coin." you say showing her your huge cock in its entire glory.