Here, for no particular reason, is a post I first wrote about 15 months ago.  I've changed it around a bit:

Aged 14, I knew all about boy-on-boy crushes and mutual masturbation, but I was pretty clueless about what was meant to happen between me and members of the opposite sex. (remember we are talking about c1957 here)

My dad - with my mother's acqiescence - had sent me to an English public school in Dorset.  Twice or so a term, he would take me out for the weekend (nights not allowed away; he would stay in a local hotel) - and we would drive around, go for long walks, do a lot of talking on a bewildering variety of subjects.

One of the subjects was women.  Recently divorced for a second time, other adults appeared to considerhim a man of the world.

One Saturday we went for a walk in the woods above Yeovil, a town near my boarding school, but in Somerset.  Dad was holding forth on some aspect of Liberal Philosophy when there was a rustle in the trees - and the site of something, two things, very white.  Two huddled up bodies, fucking.  I think they apaologised and ran further into the bushes.

I remember them as looking like elves, or even frogs.  Alien, frightened.  Unnaturally white  Is this what happened when a boy and a girl had sex?  It looked a lot more frightening than I had imagined.  It seemed to change what people looked like.

"How disgusting," said my father, no longer sounding like a man of the world.  "If they have to do that, can't they find somewhere to do it indoors?"