The dating site games

It has always baffled me as to why men and women aren’t honest on their profiles. Don’t you know its a lie from the start?
We all want an honest relationship.
So why begin it with a lie? Pictures of you 10, 20 years younger. Pictures of your younger sister, brother. Animals, scenery .Anything but an image of yourself.
So, my question is, what do you expect to get from the deceit?