Is it imperative to detach slightly from an experience of you wish to teach others about it...?

Yes, otherwise your emotions could get in the way of explaining the thing properly

Its sometimes helpful but in choosing to detàch the memory may fade and the lesson might be forgotten. I suggest making record of the experience(i write lots of things on here to document they happened.) Then when i detach to acheive objectivity at least i have what happened in writing.

Not necessarily. If you LOVE the experience, and you are passionate about it, you will actually be a better teacher!

If you want to be fair and neutral , I suppose

Probably. " so put your feet onto the pedals, and watch out for your balls .. Oh. Never mind!".

If you're a therapist, I suppose