Touch our bellies without asking.
Whether you’re a friend or (god forbid) a total stranger, please don’t assume our tummies are fair game. We don’t want to be rubbed, massaged, stroked, or informed that because we’re carrying low it’s going to be a boy, any more than a non-pregnant person would want to be touched without any warning, either.
It’s polite to ask, even if you know someone well. Some pregnant people can’t stand being touched by ANYTHING (even their clothes), so making a grab for the protruding belly just demonstrates you don’t value their autonomy as a person.