It is wrong to defraud somebody about your appearance.
Alvin is chatting with Beth, a woman he met on a virtual dating site.
Alvin wants to send Beth a picture.
Alvin sends Beth a picture of himself even though he is worried she won't like his appearance.
Alvin sends Beth a picture of his younger, athletic cousin and claims it is a picture of himself.
Beth thinks Alvin looks nice in his picture, and she is happy when they eventually meet in person.
Beth is angry later on when they meet in person, and she realizes Alvin deceived her.