It doesn't have to be a big deal.
But sometimes it is.
Sacred doesn't mean they know better. God is in you. Respect him, get to know him, listen to him, he's in your chest, he's in your breast... listen to him inside you, and you'll know what sacred is.
And if you believe God is sacred, then so are you.
Treat your body like a temple, treat your identity with beauty.
And remember: it's not dirty....but it can be.