You were in class, you hadn't thought of the answers to the questions yet, and you didn't even know them, so your mind wandered to specific situations, and despite needing to concentrate, you couldn't. You felt yourself getting hotter, your mind wandering, your body betraying you. You felt like you were going to pass out unless you did something, and so you shifted your hips a little in the chair, feeling your body reacts to the thoughts. You feel yourself turning red and notice an uncomfortable but somehow pleasurable burning sensation, and you feel a throbbing sensation that has a sticky aftermath there.