More than nine in ten men, in every survey ever run
The figure has barely moved since 1948, which is the interesting part.
Kinsey's interviews in 1948 put the share of men who had ever masturbated at around ninety-two per cent. The American national survey of sexual health and behaviour, run sixty years later with a probability sample and a computer instead of an interviewer, found the same thing across every age group it asked.
What changed between the two is not the behaviour but the reporting. Kinsey had to ask people out loud, and the numbers for anything embarrassing were almost certainly low. A private questionnaire raises the figures for precisely the behaviours people are ashamed of, which is itself a finding.
What to do with it
There is nothing here to act on, and that is the point of the fact. Frequency is only worth thinking about if it is displacing something you care about: sleep, a partner, work, going outside.
If it is, the number is not the problem and cutting it in half will not fix it. What changes things is putting something else in the same hour.
