Final answer:
Males' sideburns do not have a universal style and can vary greatly depending on cultural, historical, and personal preferences. Historical and cultural examples show that well-maintained and styled facial hair was often seen as ideal, with specific styles such as wavy beards or thin goatees being preferred in different contexts.
Step-by-step explanation:
The question "What must males' sideburns look like (if worn)?" can be understood in various cultural and historical contexts. However, based on the references provided which evoke imagery of historical and artistic representations of men's grooming, we can surmise that there is no single, universal directive for how males' sideburns should look. In one historical depiction, male figures are described as having hair that is neatly parted and possibly styled into wavelets or braids that complement a formal, wavy beard. Similarly, this aligns with the poetic imagery of young men with glistening beards in literature. Additionally, in certain cultural representations such as during the Bamboo River period, ideal male beauty was associated with a faint mustache and thin goatee, hinting at a well-maintained and styled appearance. It is important to note that the preference and style for males' sideburns and facial hair may significantly vary based on the cultural, historical, and personal aesthetics of the time and place.