Living alone, I don't flush after every wee, it does seem a waste of water when in all likelihood we could well be heading for a water shortage and rationing in times of drought.
Little factoid: urine is sterile when it leaves the body, and has been much valued through history for its various uses.
I remember reading T E Lawrence's 'Seven pillars of Wisdom' where he recounts how wounded Arab fighters would get a young boy to urinate on the wounds, and this was also Henry V111's surgeon Thomas Vicary's favoured method of wound treatment.
Urine was also used as a facial treatment in days gone by, being good for the skin. Indeed, if you suffer from dry, cracked heels, most of the balms such as Flexitol, contain urea derived from urine.
www.theguardian.com/commentisfree/2011/mar/10/unusual-uses-of-urine
So, urine has its uses, and shouldn't be thought of as 'disgusting'!