I'm curious what you mamas think about this. When DD#1 was born and my MIL would come visit, she'd always wear perfume. She's the type to wear a LOT of perfume. Problem is that she'd hold DD and then DD would smell like my MIL for a while (sometimes onto the next day). I have no scientific proof of it, but I always felt like it interfered with nursing, if nothing else because it was a constant reminder of whatever nasty/offensive thing MIL decided to say that visit. I tried swaddling DD whenever I handed her to MIL, but MIL would unwrap her so she could snuggle (grrr!).
So, do you think it's ok to ask people not to wear perfume when visiting a new baby? It seems like such a weird request to put out there, but I don't want to have to bathe my newborn every time she comes over. My other thought is just to babywear as much as possible when MIL is around, but I'm sure she'll pitch a fit if I don't let her hold the baby.
Re: no perfume while visiting baby?
Sense of smell and taste starts to diminish in older people so she may not even realize her perfume is so overwhelming. Perhaps a close family member could bring it up and get her to lighten it up? Though, once again you have to pick your battles.
Good luck! :-)
(Obviously she is allergic to anything scented)