Asking others to NOT KISS YOUR BABY

My spouse and I mutually decided we didn’t want anyone, even ourselves, to kiss our baby when he’s born. My due date is very soon so tonight my husband decided to finally bring up the topic to his parents. We live with them at the

moment and im worried they’ll over step my boundaries as it is. So anyways my husband lied and said my doctor was the one who brought it to our attention that kissing a baby could be dangerous and he and I think it’s best if nobody kisses the baby. His mom looked annoyed rolled her eyes and said she wouldn’t, his dad tried to argue and say he’s never heard of such thing and he thinks the baby needs to be exposed to the germs to help build his Immune system and that it’s ridiculous. I told them I don’t want to risk anything and if they want to kiss the baby they can kiss his beenie if he’s wearing one.

-any advice on what to do if his dad doesn’t listen? And has anyone else gone through anything similar?

EDIT* for those of you wondering why I don’t want anyone kissing my child it’s simply because their bodies aren’t strong enough to fight infections. I’ve seen horrible stories of babies contacting cold sores and meningitis, some resulting in death and I refuse to risk it.