Is it normal that my boyfriend...ass?

So One Day Im Having Sex With My Boyfriend And Im On Top Of Course, and like out of the usual, he pulls me off and starting to finger me and says i want u to cum all over me and im lookin all confused cuz his penis isnt to full length of pleasure nor was he fingering me enuff, and then he stars to finger my asshole and im all iffy about it ya know i mean what would make him try this out of no where and we have been together for nine months or so and in nine months hes juss now gettin adventureous?? But anyways he sticks his penis in my ass... Correct me on this but wud couples who have been to gether for so long talk about doing these things instead of violating privacy like that? Comments Appreciated. If More Details Are Needed Ill Provide. Thanks