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Methodology in penis size studies

Different methodologies used in studies on penis size and how these affect the results and conclusions.

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Jan 12, 2026
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How do sexual practices and preferred sexual acts (clitoral vs vaginal stimulation) change reported importance of penis size?

Sexual practices and preferred acts—chiefly clitoral versus vaginal (penetrative) stimulation—substantially shape how partners report the importance of penis size: when pleasure depends mainly on exte...

Jan 7, 2026

How does measurement technique (ruler vs. caliper vs. ultrasound) affect reported average penis size in studies?

Measurement technique is a major driver of reported “average” penis size: devices and protocols (ruler vs. caliper vs. ultrasound), the penile state measured (flaccid, stretched, erect), and choice of...