Its not fair if people are in a relationship or have a fuck buddy walking around, then not jacking it gets easier. I think the longest ive gone since ive ever started is a week or maybe two, handy combinations like sharing a hotel room with your parents and then getting ill the week after.
Even then I´d do it in the shower most the time though. I distinctly remember one time it was so good that i kept trying to emulate that orgasm long after