Please go to your preferences page and make sure your "See Mature Topics" setting is set. Setting it to "Yes" means you see the Mature Topics forum (contains political and religious debates). Setting it to "No" means you do not see those threads.
Besides the regular drinks like water, beer and tea, there are some specific drinks that trigger urine production.. I believe they were cranberry juice and chamomile tea. Googling "duretic drinks" would have saved you this entire thread