Which is of a lesser evil? thumb sucking or sucking on pacificer? my son (3mths old) has a tendency to suck his thumbs.. so whenever he does so, I will let him suck on the pacificer instead..

Pacifier is less evil. Even for pacifier also there is a limit. Best if the child is weaned not later than 3years of age as there will be distortion of the teeth with prolonged use. Try to wean your child from 1year onwards.