This is my favourite way to masturbate so I have a few places. Several times on public transport (both train and bus) At school (secondary) in class and in toilet(s). In garden at night. At lake (several times, fully naked) Riverside (several times, fully naked) Alleyway in a city. University buildi...

It depends on when I get the notion to wank. Normally in my room at the computer or on my bed but I personally prefer running the risk of getting caught so in front of windows, outside etc.