Ah, oral sex. Someone mentioned papilloma and that is a good reason too.
Babies coming out of vagina (it happens once) and spitting food into their mouths are completely different things.
My mum did not have a blender but she mashed food and chopped meat very finely. There are graters for fruits and vegetables. Nuts are easily crushed when needed with a rolling pin, a cup or a bottle.
Which food are you giving to your babies that they cannot digest by themselves (McDonalds)? Obviously the food should be right for the baby's age. We live in the 21 century where we have forks, spoons, blenders, mashers, steamers. Parents who pre-chew food for their kids are either delusional or are just taking pleasure from doing it.
You can wash the dummy if you are at home. There are baby wipes for outside use if indeed it is very urgent but then many mums carry two dummies just in case.