In the privacy of his room, Marc, a buff, tattooed gay man, decides to test his testicles with a series of exercises. He starts by gently cupping and massaging his heavy balls, feeling their weight and sensitivity. Next, he lies back, spreading his legs wide, and begins to swing his testicles, watching them sway and bounce. His cock twitches at the sensation, growing harder. Marc then sits up, grabbing his balls with one hand and tugging gently, stretching his skin taut. He moans softly, enjoying the mix of pleasure and slight discomfort.