Phallic amulets or talismans known as palad khik (ปลัดคิก) are a common sight in Thailand. Most amulets are made from brass, iron or steel (sometimes brass plated), wood and resin. Amulets may also be carved from bone, horn, and rock.
Traditionally these amulets were believed to bear the owner – and in some cases the wearer – special powers or good fortune. Even today, they may be found in many homes and shops, especially on shelves and in pantry cupboards. Although modern Thais may not believe in the “magical powers”, they are nonetheless valued and treated without ridicule.
This video shows a similar interest in amulets of male and female genitalia in Japan:
If you can read Thai, you may be interested to read this article in the Matichon Online website.