The Thai phallic Palat Kick amulets can be charm amulets, amulets to increase life energy (and libido) or even fortune amulets.
Despite their confusing (or even comical) appearance for a Westerner, these amulets are truly considered sacred objects in both Thailand and Bhutan, for example.
NB: This type of amulet is worn discreetly, either in your pocket or on your belt,
but normally never as a pendant.