He probably hasn't any experience, looking at your avatar he probably just sees an attractive woman and he could be just an open minded guy, I wouldn't read too much into it, let there ralationship grow, develop and see where it goes.
My husband has only dated and been in relatonships with cis-women before he dated me and never had experience with anybody trans, he doesn't see me as trans but sees and accepts me as a woman, we've a mutual love and respect, I was thrilled when he proposed to me, now married 6 years.