I was agreeing with the post before. If the dog analogy seems ok for you and you can actually live with it, then everything would be good but the fact, that you are thinking about it shows that you dont seem to be at ease with this arrangement.
Personally I find the whole discussion about beauty, nice figures, cool styles etc, kind of boring if it happens all the time for the pure reason that I have other things going on in life than thinking about the absence or presence of another person's beauty. However I do notice beautiful people and I know that my boyfriend does too. But there should be a certain respect in a relationship not to overdo the looking and commenting in each others presence. Basically its when he is around me, then he is number 1 and vice versa. When nr. 1 isnt around then its ok to talk and laugh with numbers 2-99. However faithfulness and monogamy is a must in our relationship.