Side-by-side video: A shirtless young man with a slim build in boxer briefs is measured by a muscular man in a black shirt; another shirtless man in a white lab coat measures a similarly built man in gray shorts.

Video of two young men, one standing in white shirt, the other sitting in white shirt and grey pants, talking behind a beige curtain, in a plain room with a TV.

Video of four young men in a clinical room. Two shirtless men with muscular builds wear black Calvin Klein underwear, another wears a black shirt and blue jeans, and a fourth man in a white shirt and khakis adjusts the shirtless man's clothing.

Video of three men: one shirtless, one in a white shirt, and one in a black shirt, standing in a modern, clinical setting with blue curtains and a red balloon.

Video of two shirtless, muscular men in blue jeans seated on a black couch in a dimly lit room with blue curtains and a shelf.

Video of two naked Asian men engaging in sexual activity on a black couch in a modern, minimalistic room with blue curtains and light wood floors.

Video of two naked, slender men, one with a circumcised penis, in a clinical room with a white wall and a medical bed, while a man in a light blue shirt watches.

Video of three nude men in a white room; one is on a massage table, another kneels beside, and the third stands behind, massaging.

Video of two young, nude, Latino men with small to medium penises, one standing, the other leaning against a blue curtain in a dimly lit room.