Any creative uses for old underwear?

So this will be my strangest post to date. I've had a lot of luck selling my old clothes on Craigslist, Facebook, and Twice. I even paid for my car's DEQ test and registration yesterday with cash just from selling my old bras! But I have a ton of barely-used underwear that I don't know what to do with. I hate just throwing things away. It's all in great shape (I bought a bunch from Lane Bryant right before I started losing weight a few months ago), but obviously no one wants to buy someone else's used underwear. Does anyone have any creative ideas on what I can do with it? I thought about making dog toys, but my dog doesn't play with toys, and who wants dog toys made out of someone else's underwear? LOL

if you have bras, Soma will take them.  They donate to women's shelters.

The bras I've been able to sell. It's pretty much just the panties that I can't find any use for.  

Sorry, missed the part about selling the bras.  I use old underwear(panties) as dust rags......

That's a great idea. It's too bad I never bother to dust!  

A new thought - Check it out - cleaning as exercise.  (Cleaning was the only thing I could think of - even for undies in good shape)

http://www.huffingtonpost.com/2013/03/24/spring-cleaning-calories-burned_n_2934204.html

Hanging planter!  Can't you see flowers growing!  Might get a laugh.  Check Pinterest.  They have everything.

I used my old jeans to make a bunch of cute things... http://theworldaccordingtoeggface.blogspot.com/2012/09/my-be fore-pants-coin-purse.html

Hmm I did use some sleep shorts to make a trim for a tote bag http://theworldaccordingtoeggface.blogspot.com/2007/07/sweet .html 

I'm with the above poster... dust rags.

Unless the undies are tagged or bagged to donate.

P.S. Donate business stuff: Dress for Success (great org) 

I donate mine to local charity. 

I gave mine to a person in my support group who was struggling to afford new clothes as she lost.  I also sold all my old clothes -- paid for an entire trip to Oregon with just my 26/28's, paid my son's tuition with the 22/24's  and recently supplemented my Disney trip with all my old 18/20s.  Unfortunately, I have found that my 10-16 clothes don't make nearly the same amount of money.  :-(