Intrusive thoughts are unwelcome and hard to control. I can remember having intrusive thoughts from the time I was a child. When we drove, I often felt the compulsion to press one foot down on the floor between the telephone poles (and yes, I also hopped over the cracks in the sidewalk). At other times, when walking alone, I remember the persistent thought, “He’s watching you.” I would search the bushes and trees for the one my mind told me was watching me.