I have a 1.5 year old lab/hound female. Since i've gotten pregnant, she would go thru my laundry hampers (with lids) and eat the crotch out of my underwear and even ate a few crotches out of PANTS that I was wearing. Background - I don't wear pants more than one day, ever. So I started taking my laundry right down to the laundry room and washing it, or gating her out of the laundry room which as worked. That seemed to help. This morning before I ran some errands, I had sorted my clean laundry on my bed to put away. I came home, and she had eaten my CLEAN underwear. I'm SO mad at her. I don't even have to yell at her because she KNOWS she was bad. I didn't understand the dirty laundry. I googled alot and didn't come up with much. But the clean underwear??? I don't get it. It's CLEAN. Washed in hot water. WTF??

DS - 7.2006 - C-Section b/c Breech
DS2 - 4.2008 - Successful Vbac
DD - 5.2012 - Successful Vbac
Re: I have a really gross issue with my dog... and my underwear.
I have to bury my underwear in the basket when I take them off, my older dog (black lab/greyhound mix) loves them. I think it's natural for dogs to like the smell, my dog loves to bury his head in everyone's crotch.
Lately, I've had issues with him going in the bathroom garbage can and getting the panty liners out and eating them, it's so gross! We got a garbage with a lid but he figured that out so now we have to make sure the bathroom door is shut when we leave the house.
Dogs have an incredible sense of smell, even if your underwear are clean, they can still pick up that smell. Good luck, I know it's totally gross.
DS - 7.2006 - C-Section b/c Breech
DS2 - 4.2008 - Successful Vbac
DD - 5.2012 - Successful Vbac
Oh my! She eats them whole!?
I have two dogs and they work as a team to get to my panties, panty liners and yes, the stuff that you use when you're not pregnant... Absolutely disgusting. We had to get a heavier lid on the bathroom garbage and I always keep the door shut to the bathroom (where the laundry and closet is too). Could you close a door and keep the dog out?
This is a daily problem at my house! My 2 dogs
LOVE my underwear. It grosses me out and makes me so mad. I came into my laundry room to find them each chewing through my brand new underwear I had only worn once...then found an entire pile of my new underwear "hidden" in the back of their kennel...like they've been hoarding them. So I figured I'd bury them in the laundry basket and they would leave them alone, nope dug them all out and shredded them. So now I have resorting to hiding any underwear up high enough on a laundry room shelf until they are washed. I don't get why they do it, I guess based on smell, but it's disgusting and it was getting expensive replacing underwear every week. 
My boy pug does this... He doesn't have the strength to destroy them, but he chews on the dirty ones. My girl pug mostly doesnt bother with them at all!
I have no advice for you but wanted you to know I have the same problem! I just try to keep everything organized and away from them.
I do have to mention(TMI alert) that years ago before we started keeping the bathroom garbage in a cabinet, she managed to eat a tampon and partially poop out the string (yes, I had to help her with that one...gross)!