Ahh, naptime...why must you elude me?

I am sitting here listening to DH try to get DS to take a nap.  It has been over an hour.  I am not sure why DS doesn't want to nap.  I contemplate going in to try to intervene but I stop myself - I must not be the controlling person that I once was.  I must allow DH to figure out his own way with DS (which he has done in all other areas other than napping).  There are times, however, when these moments are just too much for me.  Patience and flexibility....this is my mantra.