Or if you've got a sweater on, pull your arms out of the sleeves and into the sweater like you're cold, and then make your way down into your pants. lol
Private room with full bathroom. Fapped in the shower. The nurse said I looked much "calmer" after my shower. It was quick, easy, and sanitary.
high school bathroom. I was working on an assignment with a HB9, she was dressed skimpy because it was a heat wave. She has this lollipop she kept sucking on while slowly massaging it with her tongue, and I couldn't take it anymore and excused myself to the empty bathroom in the tech hall.
I was out hillwalking in the countryside. As I was descending a hill I took a break and did it in some long grass.
Well, this is weird but I used to fap a lot when laying in my stomach, no handjob needed, so if I was slow enough I could get away with it a lot when on primary school, there we were playing in the floor when I was just "having a nice time", luckily I didn't start ejaculating by then. Also once in a bathroom at a friend's house, door open, saying that I was masturbating and being funny about it, but I did not O, hopefully. Anyway all my classmates where heavy fappers so I was not really ashamed.
Oh boy, I got a long list... once in the living room when I was a teen, I thought my sister was out but she was quietly sitting in the opposite end of the room behind a pile of clothes, I didn't see her. Once when I shared a room with my grandma at night under the covers. In the car, at work when I had the office to myself...