It s not necessarily the sexual watching I worry for (it s far from being a porn addiction)
It s the weakness when he tells you he won t do it again
For the sexual bit, it s not necessarily a dealbreaker and it s definitely not against you. Most men can adore one woman and still get temporarily captivated by naked bits of other people (especially if they don t get any from their one).
Women should stop caring this much and make such a drama out of it (it s really the worst way to handle this, total emasculation) but women should be strong enough that have this under control without crying wolf.
And the way so many women set up these confrontations from a position of low self-esteem (all that drama, the feeling of personal offence, etc.) -> it s like the worst enticing way for a man to stop.
Your man's sexual attention is not focussed on you?
Re-focus it on you, go spank him in a dominatrix costume until he cries for mercy or any other kink, that ll give him enough to think without an internet browser. That will be a lot more fun to go through than all these scenes and the wailing and the drama, and, truly, it has a lot more chances to work.
And if he still misbehaves, then you kick him out the curb, without letting it even reach your self-esteem.
Being sexy is not a matter of being beautiful, it s a matter of enjoying sex without shame.
I can t understand women want to be long term with men and still not accept sex as being a big part of the attraction equation.