I am an object,

But why aren't I the object of your affections?

I have over 50 brothers and sisters.

Each with a home to call their own.

Yet you need do nothing to get me,

Still, none here have me.

What am I?

Hint 1:

> 
>  I am (at least in one sense), specific to the S.E. community.
> 
> 
> 

Hint 2: 

> 
>  My, my, you guys are slack.
>    
> 
>  Trust the Math.SE to have my back!
> 
> 
>