It's rude to point out that someone was adopted.
Mike is at a restaurant with Leah who was adopted, and some other friends when Leah mentions she has a fear of abandonment.
Mike wants to tell the group why he thinks Leah has that fear.
Mike tells the group that it's totally understandable that Leah feels that way as it's part of the human condition, and we all feel it.
Mike tells the group that Leah was adopted so since her parents abandoned her she thinks others will too.
Leah is happy to hear that Mike is saying she's totally normal for having this issue and feels better about herself.
Leah is horrified Mike just told everyone she was adopted and that it's the reason for her fears.