Smegma, the whitish substance that can build up under the foreskin of uncircumcised men, does not directly affect sperm quality.
While smegma can contain bacteria and other microorganisms, these are generally not harmful to sperm in the testicles. However, excessive buildup of smegma can lead to inflammation and irritation of the penis, known as balanitis. This inflammation can potentially affect sperm production and motility indirectly, as it can disrupt the normal functioning of the reproductive system.
It's important to note that regular hygiene practices, such as washing the penis with soap and water, can help prevent smegma buildup and associated complications.
If you are concerned about the potential impact of smegma on your sperm health, it's best to consult with a healthcare professional. They can assess your individual situation and provide personalized advice.