Thanks to @Iamnothere000 for picture, after that I started my research. First, I will ask some questions for you:
"Just use your fingers". Fingers are smaller how will it satisfy if bigger penis didn't?
Every increase on dick size means increase of vaginal orgasm for foids. I will tell the brutal truths.
We all know that there is a place called G-spot inside vagina. You can reach it with fingers because its at 1-3 inch depth in vagina. But G spot is not the real joy area of foids. Have you ever heard of A-spot?
A spot is an erogenous area that sits at the top of the vagina, between cervix and bladder. Don't tell me that "Hitting cervix hurts" its not. Average penis can not reach A-spot. Reaching A-spot can cause direct orgasm for foids. While average dicked and dicklet men are having sex like rabbit and doing nothing pleasurable to foids, big dicked man just sticks and causes direct orgasm to foids because they stimulate A-spot.
This is why small dicked cucks buy big dildos for their gfs. Imagine that you are getting cucked by a dildo.
Acknowledge the truth.