I am sorry, you seem to lack a basic grasp of reality so that makes it hard to reason with you.
http://www.scientificsonline.com/ph-test-strips.html
The first litmus paper that came up on my search. It reads from 1 to 14 and changes different colours that you can read off a chart. See how nice and small they are? I assume they are like the ones on me. A lot like filter paper. They are easy to wrap around a finger and hold in place with a ring.
And like cheese dips, double dipping using opposite ends is allowed. Cheep people can do that to save money on litmus paper. It has to be submerged? Trust me, I am more than wet enough for a quick sample by pressing a finger to me. So are most women until menopause.
I have no idea why you do not know that most body fluids range from 6.0 to 7.4 in healthy adults. Did you think blood had to be 7.4 ? Only arterial blood. It can be as low as 7.33 in the venous side. (7.35 most common quoted number).
Most healthy vaginas, including mine, are in the 3.8 to 4.5 range "at rest". I become significantly more alkaline when I orgasm. I have no idea if my orgasmic pH is typical but it is like my body is trying to get ready to reward the man by making my body more welcoming to his sperm. (<--- more or less a joke) But I seem to produce a fluid that brings me to somewhere in neutral to slightly alkaline range. Sperm like 7,2 to 7.8 in case you care.
Contaminants? He washes his hands. I do not need lubricants. Are you going to ask about about iron ring reacting to the acidity? His is stainless steel.
Does all that information make your lack of knowledge more apparent to you? Think maybe you should get a clue before opening your mouth?
Want to go on and discuss adding a bit of potassium hydroxide first to check for a fishy smell? :frusty: