Not the most pleasant sensations on a dream, but in fact occur in soil oneself or something to them - to the ambulance arrived, unexpected money and gifts.
To dream that you are defecating on someone, indicates your anger and hostility for that person.
To dream that you are being defecated on, represents feelings of guilt and unworthiness. You may be suffering from low self-esteem.
Please see also Bowel Movement or Feces.