If follicle have bottoms, how come I'm not feeling any pain from supposedly piercing it if I go beyond the bulb itself?
I am guessing because even if the probes have smooth or rounded ends, that because they are so thin (relative to even a 30g injection needle) that they can pierce tissue quite easily. Especially if the 'membrane' at the bottom is very thin and delicate.
When you mention that due to high magnification, you can 'see my probes go beyond the bulb easily with no pain'. Are you meaning that you can 'see' through the skin somewhat (because of it being translucent as such magnification)?
For reference, what magnification (and type) are you using, please.