Hmmm...this sound like perhaps you have a self-esteem issue?

Maybe, you get upset and don't want to be touched when watching things together because, even subconciously you are comparing yourself to the girls you see, and thinking that maybe your significant other might find these girls on tv more attractive?
Try not to compare yourself to these girls, I can guarantee you that what you see is not completely real. what these girls are are airbrushed, dyed, heavily makeup coated made up characters.
Try to see the beauty within yourself.