Now that I have reached my 40's...it happens more often! Fun times!
I'm with Lena and FunMonday. I'm not concerned about percentages. With the right partner, it can be very hot.
A quick Google search of love potions reveals that urine and saliva are standard ingredients... Nothing new here.
For the open minded, it is a quick way for a provider to increase her earning power.
There is a reason it's called a, "Golden Shower".