Embarring naked or locker room moments?

i was in a fitness center locker room and i thought it was the men's but it wasn't and it seemed empty so i went in the first row of lockers and got undressed and i was about to put on my swim trunks but i had to go to the restroom so since i thought it was empty i walked over there naked and when i walked past the third row of lockers i noticed there was a 17-18 year old girl with out anything on the top half of her body and im 13 in 2 months and i have about a 3 inch at most when erect and she was a hot blonde girl with perfect and i looked and she just stared at my for about 20 seconds and then she started to laugh hysterically and pointed at my . well i hope you have some worse then this!