DH would change nappies if absolutely necessary, for instance if I'd gone out and left him in charge. He never really got to grips with terry nappies though - the folds were always wrong, the pin in the wrong place, or the nappy simply wasn't done up tightly enough so leaked everywhere
.
He's never offered to change any of the GC's nappies, even though they're so much easier.
DH is the sort of GF who has conversations with DD like :
DH (calling to DD who's popped into the other room): She's fallen sideways on the sofa
DD: Can you sit her up again, then!!
DH: Erm, not sure... how do I pick her up?
Needless to say, he's never called upon to babysit. Very clever of him, of course 