The eyes are carries of information to the brain and often may stimulate the brain to react in desirable and undesirable ways that we might not always have control over. Take seeing a beautiful woman in a towel, most men react undesirable for their spouses, but some men are so constrained in their behavior that they recognize certain reaction might me injurious to existing relationships are manage to restrict their mind from exploring. Some others just don’t react. 

The Towel There in her room he stayed His naked hairy body laid Excited there in the darkened room Then fresh from her shower with alluring perfume   One look at her in the towel bare Was enough to cause this young stud there Ecstatic fury but alas it did not Life is a hamster’s and the cage is what he‘s got