You should give me the 19 year old's contact info and I'll have a man to man talk with him and answer all his sexual questions. :biggrin1:
But seriously folks.......
I don't think I'd talk to his father. He'll immediately think the son is gay which may or may not be true. This could ruin your relationship with your friend or his relationship with his son.
Although you don't say so, I am assuming they live far away and you spend the night, otherwise I don't know why you'd be showering there.
Keyhole? Really?? Is this some 1800's vintage building that has skeleton keys that you can look through the keyhole?
I would have asked him what he was staring at. Covering up and being embarrassed only gives him the upper hand. He smiled because he thought it was funny he got you to blink. You were doing nothing wrong. Stand your ground.
I would: 1) Lock the bathroom door from now on, and 2) hang an article of clothing over the doorknob to block the keyhole. Surely you can outsmart a 19 year old. It's not that hard to do.*
If the door doesn't lock, next time he comes in tell him you're using the room and unless he's bleeding he'll just have to wait until you're done.
*No offense to any 19 year olds on LPSG. Although if you are offended and want to band together and force me to suck your cocks to teach me a lesson, I certainly understand -- it's the manly thing to do. If you don't do it you're all just a bunch of little pussies. :wink:
I crack me up....