Is it possible to determine the size of a penis based on superficial external data? ⇐ General

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When meeting a man, girls would want to know what awaits them in bed and what external data can be used to guess this?... After all, for many ladies, size matters. Ladies, do you each have your own “method” for estimating and correctly calculating the expected size? penisin an erect form from your potential future sexual partner? And I repeat (probably), here in many topics: What are the optimal "ratios" of the length and diameter of the member of your desired partner for you personally? I leave out the question of who owns this member and how. This is the most important thing, but we will assume a priori that he himself understands this. And he can.