Can a poorly fitting saddle cause long-term damage to a riders perineal area, and if so, what are the most common types of injuries or conditions that can arise from prolonged exposure to a saddle that is too small, too hard, or otherwise ill-suited to the riders anatomy? Are there any specific warning signs or symptoms that a rider should be aware of to avoid these types of injuries, and what role do saddle design and materials play in mitigating or exacerbating these risks?