People with a fetish for flooding the cave may take the act one step further and drink the urine, which may be mixed with vaginal fluids and semen. Urine is sterile, so the liquid should be safe to consume, but it may not be very palatable.
Flooding the cave requires condom-free sex, so it should only be attempted by monogamous, disease-free couples. Among these couples, there is no greater health risk than any other traditional sex act as urine is sterile.
Flooding the cave can be messy. To make clean-up easy, it’s best attempted over a plastic sheet or on a tiled floor.