I had a sex dream about my best friend's younger sister
I spent my whole day yesterday at my friend's house, and a lot of the time with his younger sister. I'm an 18 year old guy, and she's only 15. She's really cool, and super grown up for her age, but she's still only 15. Well at the end of the day i was dead tired and fell straight asleep, but i woke up in the middle of the night having just had a dream about her naked and me going down on her. I'm feeling really guitly, and i can't even face my friend without feeling bad. Is it normal to have sex dreams about girls that young, or am i a bit of a perv?