
You may catch an infection if your partner has infected urine and it enters your body. A golden shower is usually safe as long as it doesn't get into your eyes, nose, mouth or other orifices. Drinking urine or having a partner urinate into your anus or vagina will allow infections to pass into your body. Having a partner urinate in your anus can irritate your colon lining because urine can contain caustic compounds.
You can develop a mild colitis (inflammation) which theoretically can make it easier to catch or transmit HIV. You will also absorb any chemicals in your partner's urine through your colon wall. The bottom line: you will absorb whatever is in your partner's urine. If you're not healthy, urine can contain substances that your body can't easily process.
If you have kidney problems, high blood pressure, diabetes or another medical problem, you could exacerbate your condition by drinking another person's urine. Drinking your own urine will only return wastes back into your blood and force your kidneys to re-filter them out. Also, if you drink your own urine you can transfer infections from your kidneys, bladder, or urethra to your mouth or throat.