The context of the following conversation is Tracy took her son Austin to the beach. She used sunscreen to protect Austin's skin from the sun.:
Austin says My mom needs to apply sunscreen on me again.  She does it a few times a day when we are out in the sun..
The friend responds She's protecting your sun from damage.  You'll thank her when you get older..
Austin responds I am already in high school and still does that.  It's not like I can't apply sunscreen on myself..
The friend responds Sometimes it's easier for someone else to rub it in..
Austin responds I get it.  I get burnt so easily that I need to drench myself in sunscreen..
The friend responds Or not go out in the sun..