38 for me.
Married but no kids, and sex had dried up to the point where I seriously thought I might never have sex again in my life. Had considered punting years earlier but felt it was too shameful and self indulgent, and there was still hope of getting it at home in those days.
Got round to the thinking that as I was taking the money home and had been faithful I might as well treat myself and live life a little.
Browsed auto-censored a couple of times but didn't do anything. Then got hassled by a WG in a hotel when alone abroad. Turned her down initially but bumped into her again later, and thought ...fuck it.
Nothing much happened after that for a few months until moving up to Manchester... and then the floodgates kind of opened.
There's the opposing emotions to the hobby. The regret of throwing away so much money; of getting off with girls who mostly don't enjoy it. But in a perverse way I'm also a little bit proud of my punts, and the extra experiences they've brought.