Porn???

Ok so I have this thing that's been bothering me lately. I found out my SO watches porn 2 to 3 times a weeks and gets off. Now mind you idc if he watches porn, what's bothering me is the fact that we go two weeks in between bd and he still does the porn thing in between. Like why can you get off to porn but not want to make love to me for two weeks. Anybody have any in site on this. TIA