Husband uncomfortable changing a diaper ?

Has anyone's husband expressed discomfort with changing a baby's diaper, mainly if the baby is the opposite sex? Long story short, my husband was put on the spot to change a friend's baby's diaper the other day. Aside from never having EVER changed a diaper before, he was uncomfortable because she has a daughter. I think it does make sense to be more comfortable with a baby who has the same body parts as you, also not wanting to hurt them, also it being their private area, and having ZERO experience with diaper changing. I googled it and a lot of info came up from husbands who had the same issues with their own children, let alone someone else's. Just wanted to see if anyone else's husband has ever expressed a similar concern? I should add I am pregnant with our first, and we are both brand new to all of this, so we have a lot of learning to do - I think my friend was trying to be helpful by suggesting that he get some "practice" but I knew he was uncomfortable