I posed this question in a reply to comments on a recent picture which started an interesting dialogue with Leslie Reid. I am curious if other members have thoughts on this subject or perhaps experiences that touch on this. I'll try to post the picture to give you some reference (this is my first time starting a forum thread, so I'll just try to take a stab at it). I've asked Leslie to repost her replies and I will do the same with my answering comments, just to start the ball rolling. Here goes.