So far personally have only knew one case whereby two gals and 1
guy. The two girls are very good friends, one very beautiful while
the other is so so. But its seem that the so so girl wants to
experience sex and yet do not want to give it to any guy so her
pretty friend set it up by making the boyfriend a bit drunk and the
rest is history. The bf was very angry but cooled off after some
time. Anyway the beautiful girl and the bf just register their
marriage in May while the so so girl is registering her marriage
this coming November. Anyway it is one time affair.