Is it okay for men to see women in OF or on any other social network just bc they are men even if they have a relationship?

My boyfriend sees girls like that, what bothers me is that he said when we started dating that he didn't follow any girl like that anymore. Then when we were with another friend, he said that men looked at others women's like that even if they are married because they are men. On another occation he mentioned that if a woman has good legs even though she is ugly he would have relationships with her, isn't it a lack of respect for me? Maybe I'm very old-schooled for these things but when I'm in a relationship I really only notice that person and I don't see anyone else no matter who it is.
Is it okay for men to see women in OF or on any other social network just bc they are men even if they have a relationship?
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