Boyfriend and communicating.

So my boyfriend is huge on communicating. He always says he wants me to be comfortable with whatever we do and to talk to him if I ever feel differently. I am never uncomfortable but when I started my period the other day I didn't feel like I should tell him and outright that I was bleeding and couldn't be touched down there right now. But he just asks if I am on my period. And I said yeah and I was wondering are all guys so straight forward about that stuff?