Meanwhile I'll explain my reasoning behind the already solved 5 clues and how they relate to the final answer, the clitoris.
To the best of my google search abilities and my own views based on my experience with the toothbrush -
what we see is less than a fifth of the clitoris and most of it is
BENEATH and the actual shape of the organ is something like in the gif above. Only the clitoral hood and glans seem to be a part of the external genitalia or
VULVA, the vaginal/ g spot orgasms that we have can also be because of the two erectile bulbs of the clitoris surrounding the vaginal walls.
In fact it is the only part in the human body meant solely for pleasure /
HEDONE. In fact that could be one of the reasons why research on this was carried out so late and only in the last couple of decades as contrary to patriarch beliefs it shows that pleasure isn't secondary after reproduction for women and there is a whole organ devoted just for pleasure so a woman can have sex like two men...lol Of course it is a
POWERHOUSE of heightened sexual pleasure and plays a significant role to reach
CLIMAX.
I toyed with my vibrating toothbrush on my clit a lot recently and in the process found out a spot where it was most effective for me, I was surprised that I could orgasm multiple times and more strongly than I ever had. I could feel the tingling right down my feet and clenching my thighs and fidgeting increased my sensations. And each time I did orgasm, it felt so awesome. I wouldn't have stopped even after tens of orgasms but couldn't take the spasm chills and the electrifying tingling in my feet any more.
After a couple of days when I tried it again, I figured there were many other spots I could place the brush at on the visible part of the clitoris glans with equal reactions. For someone like me who always believed their libido wasn't that high, I was pleasantly surprised. Clitoris is the most empowering and underrated organ. I wanted to write a blog but I ended up making it into a puzzle so people do some digging in this area. Sorry for the blabbering.
Hope this motivates you to solve the last clue