Just show him the Porky's Trilogy and he's set for life.
Seriously, I'm never having kids, so I don't know how I'd react, but I'd like to think I'd handle it with creativity, sensitivity and practicality. Along with a bit of nervousness.
Btw, I remember being 4 and feeling myself while watching an Annette Funicello beach movie.
So, it happens to youngsters more than you'd like to think.
Hmm, I wonder if my brother and sister need help talking to their kids...
Aim for the hole!! Aim for the hole!!
/aren't you glad I don't have kids?