Bageshwar Dham Sarkar
Why is faithfulness important in marriage?
A man's dharma: one wife only
A man who gives place to only one wife in life and never looks at another woman with a bad eye comes in the category of a brahmachari, one who lives in discipline. This is not only the dharma of women but of men too.
The man who spends his whole life with one wife and does not even look at another woman with a bad eye comes to the state of a brahmachari.