[taylalatbh.]

This is definitely not something that friends do. It seems like he's trying to be sexual with you, but he's not really going about it the right way. I don't really see a reason why you would want to see his erect penis, unless you were dating and about to have sex with each other. There's no other reason why this would happen.

My advice would definitely be to say no to his offer. He could try something with you when you are alone together, and if you don't want to be sexual with him then you should avoid that. I appreciate that penises can be an interesting thing to look at, but most young lads (don't take this as an offence, guys) who show girls their penises in this way probably just want to have sex with them.

If you do plan on spending time with this guy alone, make sure he knows that you don't want to have sex with him. Whether you see his penis or not, you don't have to have sex with him. You don't want to put yourself in a position where you're vulnerable with him.

Take care.