He stumped me

On the way to school this morning the radio was on, and Josh heard this line "Let me love you, 'til you learn to love yourself" and he asked me... "How can someone NOT love themselves?  How do you explain self esteem issues to a 10 (almost 11) year old boy, who clearly has never struggled with such a thing?  There is so much I could have said!  But he asked with such innocence and confusion I couldn't say a thing.  I just shrugged and said good question.