I have absolutely no earthly idea how big my penis is but I do know how big my “certain part of the male anatomy” is. Does that count?
Awww, you are like a little trusting kitten 
Hmmmm, you got one possibly honest answer so far. That exceeds my expectations.
Both can only be described using the third panel here.
Both are beyond human comprehension.
That word.
I do not think it means what you think it means.
At least, I hope you don’t mean it that way.
I never could get infinitesimals…
I have gotten as high as 165 and as low as 120 on an IQ test.
My penis is probably 6 inches long erect. When it’s up, I’m usually thinking about something other than finding a tape measure.
I took a test online that gave me a 130, but never saw the point of doing anything professionally. I do know how standard distributions work, though, and I think knowing when someone’s bullshitting you on their score is a much better predictor of intelligence than IQ (which I hear is adjusted for the age you took the test).
Measured myself when I was fifteen, out of a vague sense of adolescent insecurity. 'Twas a hair under six inches, and I’m too vain to be argued down.
Did you burn whatever you were cooking that day?
151 and 9.5 inches.
Oh- no joke responses? OK.
148 and 8.75 inches.
141
6.2
Smart enough and big enough.
No jokes? That was a joke right?
IQ: 6
Penis: 137"
I’ve never taken an IQ test. I’m smarter than the average person, but not as smart as Sharon Stone’s and James Woods’ publicists claim them to be.
My penis is average in length and a bit more than average in girth. Won’t make anyone run screaming, but won’t set them to giggling either.
That is absolutely disgusting.
I am quite stupid actually. I really do think with my penis. 
My IQ is so large that my wife complains about it hitting her cervix sometimes. I tell ya, it’s a curse.
Standardized tests throughout elementary school show my penis to be in the middle percentiles for length and girth but in the 99th percentile for spatial reasoning.
12
Let’s put it this way. Some women I’ve dated have been intimadated by one of them.
Both are bigger than I can use.