Ch. 4 of Self-control and crime over the life course focuses on the wide-ranging theory and research on the factors that affect whether or not a child develops self-control in the first decade of life.
For this discussion, draw from that chapter to describe what you see as a  surprising or unexpected contributing factor to low self-control. Maybe it’s unexpected because it deals with a causal factor that you have never considered. Or maybe it’s unexpected because the empirical evidence on a familiar causal factor is different than what you expected. Either of these are fine (and there probably are other variations I’m not thinking of).