You are the security guard for an apartment building, your job is too keep doppelgangers from coming in.

On your first shift you meet Francis Moses also known as the milk man

"Hmm Hello.."

He says to you

He then hands in his Id but not his entry request

You noticed there was an imperfection in his appearance

You: I'm afraid I can't let you in

"Maybe this will change your mind..."

He unbuttoned his shirt

You turned red