I can provide information based on common practices.
Yes, briefs (underwear) can typically be washed in a washing machine, along with other similar types of clothing. It is generally recommended to wash them with like colors and follow the care instructions on the garment's label. Using a gentle cycle with cold or lukewarm water is often suitable for underwear. Additionally, using a mild detergent will help maintain the fabric's quality and prevent any potential irritation to the skin.
It's essential to avoid using bleach or harsh chemicals on underwear, as these can degrade the fabric and cause discomfort. Furthermore, it's a good idea to separate heavily soiled items from underwear to maintain proper hygiene and cleanliness.