You are simply seeing light touching your eyes

I was listening to a buddhist monk talking about masturbation addiction and his advice about it: > When you see the human body or these sexual acts on a screen or > magazine page you are not actually seeing **these things. You are > simply seeing light touching your eyes.** And when you can come to > this realization, where seeing is simply seeing, then you will have no > thought of the person's hair, teeth, beasts, etc. There is only > seeing. So you are able to see anything and see it simply for what it > is. Thus there is no connection made. Seeing is seeing, because that's > what it is. You don't see a human body and say that it is beautiful, > because you realize it's ridiculous to say that, because this is > simply light touching my eyes I have difficulty to understand what the monk means by that, what is the difference between seeing a screen and the "seeing light touching your eyes" Could you give me some pointers ?