A bidet cleans using pure water. Toilet paper is only required for drying. Cleaning with a gentle shower spray is very effective, as the water reaches even tiny skin folds and simply rinses off any soiling. In comparison, toilet paper is less flexible which often means that not all residue is removed. A bidet is also kinder to skin. Cleaning with dry toilet paper irritates skin with mechanical friction. This can potentially cause sores. The risk of skin inflammations is also relatively high as toilet paper is not sterile. From an environmental perspective, a bidet also makes sense: While it consumes minimally more water, it saves a lot of toilet paper. Production of toilet paper is very energy intensive and uses valuable resources.