Happily Married and commited guys ..question for you ..

How is it at all possible to stay commited when you see beautiful hot and young girls who are much much more attractive than your girls ? Can you guys really remain faithful ? Please dont take this as an offense to your faithfulness but if i were a guy ..it would really be extremely hard for me to remain faithful if i make beauty the parameter of my spouse or love as my girl might not be the most beautiful one.