Guess

Normally I don't show myself
I am always totally covered
But I am very visible for few
I am smooth and firm

I like colors but I am black
In special cases I turn white
I have many shapes
Some cut bigger some small

I come with and without straps
Some find straps a bit more flashing
But some moment I am shown
To impress a bit and create longing

Guess who I am

Lingerie