It's wrong to pretend to be somebody else
Greg, an accountant, is hitting on a woman in a bar, and she asks him what he does for a living.
Greg wants to get the girl's number.
Greg tells the woman everything about himself and is completely open.
Greg tells the woman that he's the CEO of his own business.
The woman likes that Greg is being open and is more willing to give him her number.
The woman doesn't believe Greg, so she doesn't trust him as much.