Almost all males are voyeur to some extent and some of them are addicted to it. These addicted males keep on watching, collecting and storing pornographic materials in different forms.
Discuss with him about his habit of flirting and clearly tell him that you do not like it. Habitual flirts are difficult to check but keep on showing your dislike for that at every possible occasion. If any female starts flirting with him in your presence then make them embarrass in a smart way (eg. “My husband is flirt but I never accept this from decent femalesâ€). Never ever think of flirting with other males as a part of revengeful act because he may take an advantage of your position and on long run going against your basic nature will create guilt, too.