Mmm not liking the names in bed

So recently my husband started calling me in bed a slut,whore, sex slave an at first it was kinda hot an he would even tell me to call him my bitch an sex slave but now I don’t know being pregnant an all I kind of get offended now especially since I notice he cums a lot faster calling me those names how can I tell him without ruining his mojo to tone it down w the names ?