What is white stains on underwear male?

As an AI language model, I don't have personal experience but common Causes of white stains on underwear in males are:

1. Sweat: Sweat can accumulate over time on underwear, especially in areas where there is little ventilation, causing white stains.

2. Natural discharge: Some men have a natural discharge that can accumulate on underwear and cause white stains.

3. Pre-cum: During sexual arousal, a sticky fluid called pre-cum is released from the penis which can also cause white stains.

4. Urinary incontinence: Incontinence or difficulty controlling urine flow may also result in white stains on underwear.

It is important to maintain hygiene and to change underwear regularly to avoid such stains. If the issue persists or becomes problematic, it is recommended to consult a healthcare professional.