Not once has dh taken ds out on his own, not even around the village where we live.
If I take ds to feed the ducks or for a stroll, then now and again he'll come with us, but on his own, never 
The nearest he came to it is when ds was tiny and he took his 14 year old son with him and strolled round the village, though by the look on his face when I said I wasn't coming with them was priceless.
It's not like he's a novice he has 2 sons from his first marriage.
AIBU to think that as ds's father he should take him out now and again to have father and son time.