I go to the mall with male friends

I go to the mall with male friends. And then feel want to the restrooms I tell a friend to go to in the restroom. Fit the friends wanted to the Restrooms. When to the restrooms must be separated into. But I press the phone does not look at then walk to the Restrooms. When I am done I out to find friends stood in front of the sink. So I asked my friend, “what are you doing here at the women’s restroom”. My friend bewildered and reply to that, “Here is the male toilets are not the Women’s restroom Female toilets on the other side”. I was shocked and embarrassed ran out of the restroom immediately.