While I certainly understand wanting to erase the pain or the memories I wouldn't want to because we learn & grow from pain. If I didn't remember those lessons I'd just keep repeating the same mistakes and experience more pain. I think pain does have an important purpose. It tells us something is wrong and manytimes we need to do something differently. As CS Lewis says "pain is a megaphone" trying to get my attention. I think we know this easily with physical pain and get to the doctor but as westerners we are not as clued in to things like emotional pain and aren't as skilled at handling it (as adults that is-children frequently don't have options to change things.)