I'm glad you did. Back in high school I wasn't a good student and in classes like geography and science I'd sit at the back, get my erect penis out under the table, push back my pubic and shaft hair(so it wouldn't get pulled) before rolling down a reservoir-tip condom then going all the way, filling it with sperm. I'd take it off, wipe my dick with a paper towel or at least a kleenex, then tie the condom at the top and dropping it in the waste basket before leaving class. I made sure the condom was inside the paper towel for more discretion. I did not want that being noticed. This is what I was doing in class between 15-17, 10th to 12th grades.