Lord Robert Baden-Powell, world founder of scouting and author of Scouting for Boys, is widely believed to have been a repressed homosexual. (Yes, I know he was married, but it wasn't until he was 55, and he remained celibate until then.) Powell reportedly had a minor obsession with watching his scouts swim in the nude, and, like many of contemporaries, was obsessed with the idea of self-abuse, or masturbation. Lest anyone get the wrong idea, I'll add the caveat that I don't think this diminishes in any way what Baden-Powell accomplished, or even suggests that his motives were impure; however, it's pretty interesting in light of the Scouts' recent ban of homosexual scoutmasters in the US.

The most useful references for someone looking for further information are this 1999 slate article:

http://slate.msn.com/Features/baden/baden.asp

or this page

http://www.duende.demon.co.uk/baden.html

... both contain quite a bit of documentary evidence.