[Sirius Lee]

Observe how they behave toward other people.

And observe how their parents treat each other. That is, if you get that far into the dates so as to meet them.

[Harmless Teddy Bear]

And observe how their parents treat each other.

Some times is a marker, sometimes not.

Some people who come out of horrible families are decent kind people. And some people who come from decent kind families are horrible.

People are how they choose to be.