What will happen if a boy uses a breast pump?

If a boy uses a breast pump, it may not yield any milk since boys do not have the necessary breast tissue or hormonal changes required for lactation. However, using a breast pump can stimulate breast tissue, which might lead to temporary swelling or sensitivity. It's important to note that breast pumps are designed for lactating individuals, and using one without the proper physiological context may not provide any benefits. Additionally, it could lead to discomfort or injury if used improperly.