Some cultures consider nose hair coming out from the nostrils to be ugly. The increased growth of nasal cilia with age (particularly for men) is often a source of anxiety and embarrassment. A number of devices have been sold to trim the nose hair, including small rotary clippers and attachments for electric shavers. However, given the role of nasal cilia, many doctors recommend trimming them lightly, if at all. There is evidence that the movement in the ciliar slows down with age. This may be the reason that old people have more respiratory infections.