Becasue you haven't seen literature means that you haven't sought it out.
Sex is used to sell shit because everyone has sex, even when done poorly its still good. Few ski, and even fewer do it well. Still, the economic impact of skiing in the US alone is in the billions of dollars.
Skiing can be done from an early age well into advanced years. We have an 85 year patroller at my resort; he's had both knees replaced.
Skiing can be done by yourself, with a friend of any sex, or with a group, all without sin. You meet new people while skiing constantly.
Skiing is done outside, in the sunshine. If you do it well and folks stop to watch and cheer you on.
A ski day lasts at least 6 hours.
Skiing keeps you in fantastic physical shape. You rarely see an overweight person skiing, and never see any obese ones.
You can compete with others in local, regional, state, national or international competition. You can join a club, meet more new people, and form lasting relationships that allow you to get together and ski.