He won’t do it !!??

My bf n I have been together for almost 4 years n after tha like first year he doesn’t really even eat me out n before n after I start my period I have n oder n once n a while I will have n Oder n he tells me I do n it makes me feel bad I’m human I’m not ganna always smell like raspberries n cream like what is it is it me ?? How do I get him to goin down south??