Floor
Bulgarians are sensitive about floors. The ground is usually considered dirty, which leads to several important pieces of advice. You shouldn't put your feet up on tables or chairs. If the floor is considered dirty, your feet will transfer the dirt wherever you rest them. If you expect to use towel again, you don't allow put it on the floor. A towel placed on the floor is no longer useful for drying the human body. This is particularly important at public pools and fitness centers. Bulgarians will lecture you openly about this breach of cleanliness.
Remember, you do not put your bag, purse, backpack or other belongings on the floor. Find an open chair, pull it near you, and place your belongings on the chair. If there are no free chairs around, ask to share with someone else who has their belongings on a chair. Bulgarians are very polite and generous to share with foreigners in this way. Do not sit on the floor or expect Bulgarians to sit on the floor. This can be overcome by providing a mat, rug, or other item to sit on instead of a bare floor.