Ref. No. 38/797
In the name of Allah the most Gracious the most Merciful
The answer to your question is as follows:
The man’s ‘awrah’ – (intimate parts) from the navel to the knees – must be covered by clothing. Exposing any of the intimate parts in front of males or females (any) is unlawful and Haram. Exposing them is regarded as a major sin (Gunahe Kabirah).
And Allah knows best
Darul Uloom Waqf Deoband