Did you grow up in a home where you ate & drank after each other?

I grew up in a home where we did not eat from each other's plates or sip from the same straw someone else was currently sipping from.

(For example, if my brother was drinking the last Powerade from a bottle, I would not ask for a sip from his bottle, but a cup of my own to drink a poured amount from.)

Some friends thought this a bit strange, seeing as how we were family and no one's health was compromised.

How was this done in your house, growing up?