Im sorry to hear of your DH disappointment at a girl.

We recently found out the sex of our baby (we have a 2 year old daughter), and first thing DH said was ' well we're going to have to try for #3'. (he was so adamant we are only have two) I was shocked and disappointed, but then he quirked up and said how excited he was at having his 3 girls (me, and his two DD).
I do think its a male thing - the macho mateship relationship they form with other males, and undoubtedly their sons. BUT, in saying that, i am one of four girls, my mother and father tried for a boy, but got 4 girls instead - we all loved rugby league and watched it with dad, we took an interest in his soccer and we used to go bike riding with dad too - the kind of things you would have thought fathers and sons would have done. Just because your little angel isnt a BOY, doesnt mean a special relationship with the odd footy game cannot be enjoyed......

And as my dad used to say - he LOVED being the only male in the house, he got all the attention (or so he thought, he, he,he).