While I'd love to get as close to being a real infant as possible, there are a few things I might see to be too gross to try.
1. Infant nose cleaning: Mommy using the blue plunger/sucker and blowing air into your mouth to clear your nose. Me? I'd try it with my wife. A friend or someone paid to do it would be too nasty.
2. Eatting: Mommy chewing your food before she feeds it to you. Me? You couldn't pay me to do this. :p
3. Pacifiers: Mommy picks your paci up off the ground, sucks it clean before putting it back in yours. Me? Not too sure on that one to be honest.
4. All purpose cleaner: Mommy using her spit to clean your face. Me? My mom did this to me until I was old enough to walk to school by my self. I think it wouldn't gross me out too much.
I'm just having fun with this post, nothing serious, just typing what came to mind