no, I don't think it's wierd. I know a few guys who have a tattoo there. I think the only girly place to get a tattoo would be on the hip or around the belly button.
I see nothing wrong with having sex, he is your husband and there is nothing morally wrong about it. Maybe you are afraid of what it may feel like or if you two may not be sexually compatible, but you will never know until you try it.