To share or not to share ?

Are there some things you are OK sharing with people especially people close to you like your siblings or your partner?
 What are your No-No's? Would you share a :

Comb/hair brush?
Toothbrush?
Bar soap?
Towel?
Make-up?
Beer bottle?
Water bottle?
Washed Socks?
Washed undergarments?
(Cutlery)Spoon/Fork?
Coffee mug?
Bowl of cornflakes? 
Shoes?
Wrist watch? 

Feel free to edit the list and share your thoughts *wink*