Penis pins are normally installed at puberty or later (see Brown, [1991:p437]; Burns, 1849:p149) (cf. Kayans). Lumholtz (1920/1992) notes the absence of puberty rites among the PENYAHBONGS, DUHOI (Ot-Danums), and the existence of a menarche rite among the OMA-SULINGS.
Janssen, D. F., Growing Up Sexually. Volume I. World Reference Atlas. 0.2 ed. 2004. Berlin: Magnus Hirschfeld Archive for Sexology
Last revised: Sept 2004
 Brown, D. E. () The penis pin: an unsolved problem in the relations between the sexes in Borneo, in Sutlive, V. H. (Ed.) Female and Male in Borneo. Williamsburg: Borneo Research Council, p435-54
 Burns, R. (1849), in J Indian Archip & Eastern Asia 3:[p149]