Um....I kinda felt weird telling this but...I'll try.
I was in the shower and I was all clean, but I got really hard for no apparent reason. So I got out of the shower because I had read something about doing it in front of a mirror, so I thought I'd try it.
I didn't bother getting dressed, I just went straight to my parent's room (they weren't home) and I sat on the bed in front of the mirror. I started playing with myself and I realised that it WAS hotter. I got on the floor and lay back against the bed, I felt myself get closer and closer until I had a massive orgasm. I didn't want to get any cum on the carpet so I held it in my hand and walked back to the bathroom to wash it off.
I haven't done it in front of a mirror since, but you never know.