lcberg04
germancel
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- Jan 15, 2021
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I think one of main reasons us guys care about penis size (besides wondering whether you can satisfy a woman with your current penis size) is that we naturally want to be better in any possible way than our girls ex boyfriends which includes having a bigger penis than any of her previous partners because lets be real most of us will never LTR a virgin in today's age anyway.
First, we determine the "rareness" of your size, also known as your percentile. (Tools like CalcSD.info are great for this, using a solid baseline of 30,000+ clinical measurements).
Let's assume a theoretical size of 16cm long (about 6.3 inches) and 13.8cm in girth (about 5.4 inches).
You might intuitively think, "Isn't the chance just 8.6% and 3.9%?" Nope. It's not that simple. For any single random guy you meet, the probability that you are larger is 91.38% (for length). But each new person your partner has been with was a new roll of the dice. Because we are looking at a series of independent events, we must multiply their individual probabilities.
If the probability that you are larger than one random person is $P$, then the probability that you are the largest out of $N$ random dudes is:
Let's run the math for length:
If you are in the 91st percentile for length and your partner has been with 12 other guys, there is only a 34% chance you are her longest. The complement to this (meaning the remaining probability) is that there is a 66% chance at least one guy was longer than you.
Let's run the math for girth:
There's a 62% chance you're her thickest. Ultimately, it's just a numbers game.
So unless you're actually super blessed or your girl is a virgin you pretty much fucked when it comes to being her biggest. Not to mention most girls in west are hypergamous and hyperfixated on looks and probably prefer and get with taller men on average (especially if she has options), so since we know that there is weak but positive correlation between penis size and height i wouldnt be suprised if the numbers are actually slightly more fucked for the average guy than calculated here
Step 1: Find Your Percentile
First, we determine the "rareness" of your size, also known as your percentile. (Tools like CalcSD.info are great for this, using a solid baseline of 30,000+ clinical measurements).
Let's assume a theoretical size of 16cm long (about 6.3 inches) and 13.8cm in girth (about 5.4 inches).
- Length Percentile: 91.38%
- Girth Percentile: 96.14%
Step 2: The Probability Formula
Let's say your partner has been with 12 other dudes, making you unlucky number 13. What's the chance someone was longer or thicker?You might intuitively think, "Isn't the chance just 8.6% and 3.9%?" Nope. It's not that simple. For any single random guy you meet, the probability that you are larger is 91.38% (for length). But each new person your partner has been with was a new roll of the dice. Because we are looking at a series of independent events, we must multiply their individual probabilities.
If the probability that you are larger than one random person is $P$, then the probability that you are the largest out of $N$ random dudes is:
Let's run the math for length:
If you are in the 91st percentile for length and your partner has been with 12 other guys, there is only a 34% chance you are her longest. The complement to this (meaning the remaining probability) is that there is a 66% chance at least one guy was longer than you.
Let's run the math for girth:
There's a 62% chance you're her thickest. Ultimately, it's just a numbers game.
The Odds Breakdown
The following table shows the probability of being her largest based on your measurements and her number of previous partners :| Percentile | Approx. Length | Approx. Girth | N=3 | N=5 | N=10 | N=20 |
| 50th (Avg) | 5.4" | 4.5" | 12.5% | 3.1% | < 0.1% | 0% |
| 75th | 5.9" | 4.9" | 42.2% | 23.7% | 5.6% | 0.3% |
| 90th | 6.3" | 5.3" | 72.9% | 59.0% | 34.9% | 12.2% |
| 95th | 6.7" | 5.5" | 85.7% | 77.4% | 59.9% | 35.8% |
| 99th | 7.5" | 6.0" | 97.0% | 95.1% | 90.4% | 81.8% |
Analysis of the Numbers
As you can see from the logic, size is a game of diminishing returns against volume (the "number of partners" N).- Even if you are in the 90th percentile (larger than 9 out of 10 men), if your partner has been with 10 people, there is only a ~35% chance you are the largest she’s seen.
- Once you hit the 99th percentile, the numbers become very "robust"—you remain the largest in the vast majority of scenarios, even as $N$ increases.
