I remember a colleague of mine at a treatment center I worked at years ago commonly made the comment that we don’t see enough people blushing or weeping over their sin. Weeping is a direct representation of repentance because of one’s sinful nature and the need for God to fill one’s heart. We should allow ourselves to feel the pain of what our sin has done. That is part of the grieving process as well. We should be able to grieve over the consequences of what sin has done. If all you do is smile after you realize what sin has done you haven’t been truly honest. This weeping is part of the shame process from original sin.