Sex portal Biology portal. The phenomenon of Parties in Rumbek Swing, or at least its wider discussion and practice, is regarded by some as arising from the freer attitudes to sexual activity after the sexual revolution of the s, the invention and availability of the contraceptive pilland the emergence of treatments for many of the sexually transmitted diseases that were known at that time. Gender, Family, and Sexuality: Many cite an increased quality, quantity, and frequency of sex. Parties in Rumbek Swing please free mind from foolishness and accept the facts. ST Comments on the Sudan Tribune website must abide by the following rules. If you want to express yourself in more detail than this allows, please e-mail your comment as an article to comment sudantribune.