Van Praag cites Jasper who documents marriage commitments resulting from a brief parentally supervised stays in a doeroeng. If affianced, they continue to frequent the doeroeng though with a code of mutual avoidance (J, p272-3).
D. F., Growing Up Sexually.
Last revised: Sept 2004
 Jasper, J. E. (1906), in Tijdschr Binnenlandsch Bestuur