The answer to this question depends on the specific Buddhist tradition.
Theravada Buddhism
In Theravada Buddhism, which is dominant in Southeast Asia, monks are expected to remain celibate. This means they are not allowed to marry or have sexual relationships. This practice is based on the teachings of the Buddha, who emphasized that attachments, including those to family and relationships, can lead to suffering.
Mahayana Buddhism
In Mahayana Buddhism, which is prevalent in East Asia, the rules regarding marriage for monks are more flexible. Some Mahayana traditions, such as Zen Buddhism, allow monks to marry. However, these monks often take vows of celibacy and may not have children.
Tibetan Buddhism
Tibetan Buddhism is a branch of Mahayana Buddhism with its own unique practices. In Tibetan Buddhism, some monks are allowed to marry, while others choose to remain celibate. This decision is often based on personal preference and the specific lineage they follow.
Other Buddhist Traditions
There are many other Buddhist traditions, each with its own set of rules and practices. It is important to remember that the rules regarding marriage for monks can vary significantly depending on the specific tradition.
In conclusion, whether or not Buddhist monks can marry depends on the specific tradition they follow. While Theravada Buddhism generally prohibits marriage for monks, some Mahayana and Tibetan Buddhist traditions allow for it.
