Research puts average erect penis length closer to 5.1–5.5 inches. Here's what studies actually show about size, measurement, and what partners report.
Medical screenings catch conditions before symptoms appear, but they come with tradeoffs. Here's what they test for and how to weigh the benefits and risks.
Trichomoniasis is the most common curable STI, yet most people have never heard of it. Here's what the numbers actually look like and why it often goes undetected.