First of all, we don’t want to be a buzz kill for any fetish; we're here to celebrate them - hence the name! It is, however, essential to be aware of any potential health risks, so consider talking about things BEFORE doing them as your number one precaution to take. Oh, and (because we can never say it enough) consent, consent, consent!
In general, urine is sterile if the person is healthy, but how can you know? Get tested, eat right, drink water, communicate with your partner(s) about any potential risks. Sex is messy and wet; you exchange fluids, it’s just what happens. So if whoever you’re playing with has something, chances are if they pee on or in you, you’ll get it too (and vice versa).
Some not-so-nice-things you can potentially get from piss play (or for that matter, sex of any kind):
- Any bacteria, fungal or viral infections the person might have (especially if you ingest urine)
- Hepatitis (B)
- Genital herpes (even if there are no visible symptoms)
- Most common STIs - chlamydia, gonorrhoea (if ingested)
- Substances - illegal drugs, alcohol, medication (so if you have to take a piss test you might want to check out what your partner(s) are taking)
- Some good news: there are no known cases of HIV transmission through ingestion of urine - but there is a risk, of course.
If you want to pee inside your partner keep a few things in mind:
Pee is acidic and will fuck up the pH levels inside a vagina - those levels keep it healthy. It can increase the risk of yeast infections (thrush) and bacterial vaginosis. Pregnant women should hold off on piss play until after they’ve finished breast feeding. So if this is something you absolutely must have for sex, check with your doctor about it.
If you have a cut or open wound, make sure to cover it up properly before play and do your best to avoid pissing on or near the area. There will be enough fluid exchange going on; you don’t need to add one more into the mix.