Thank you for asking this question! Let’s discover with a bit and a byte by exploring. First and foremost consider answering questions of interest is fun. Practicing how to say something with less is interesting. Becoming less wordy may result by being wordy.
“Fatale” does mean fatal. Exploring usage seeking meaning Oxford Dictionary offers, “Causing ruin or destruction; disastrous.” As an adjective the noun – Homme is defined. It is gender neutral, although attributed more with the term “female” than “male” historically. The same is seen with bad boy and good girl. Yet, ponder setting, history, sociology, culture, family values and ages.
Agreement both are dark with those phrases in various cultures, yet society as a whole may today with the media hold them in a high regard with a status of hero.
Beat? Humor offered says it depends on the CD, DVD, band, or what may be hummed either aloud or silently.
Yes, boys are boys. With the English language boy seems to offer more usages with terminology than most languages. Ponder the age old adage, “The difference between men and boys are the price of their toys.” Consider forms of usage like boy with racism - slave, boy with Rites of Passage - fathering, boy with gender type identification – tomboy, boy with hedonism – boy toy, and more.
Homme fatales are men most assuredly since Homme does mean man. The distinction as a type is being destructive seeking to cause ruin. Ponder, what is to be ruined or is ruined.
How are men vs. boys used in society at large?
The Marine Corps once said, “Looking for A few Good Men.”
The Army once said, “We will Make Men out of Boys.” That is common worldwide for differing armed services as branches of government.
The Navy once said, “Men Wanted,” and sometimes they supplemented with “young.”
The Air Force still says, “At 'em boys,” midway through the first stanza of their official song. The beginning of the second stanza begins with “Minds of men fashioned . . .”
Those offer an idea or concept of a difference between men and boys by a perspective of many. Now, known is what a man may be defined as. The question becomes are they destructive seeking to cause ruin?
Not, enough space. Working on another writing project, therefore here becomes a stop sign or at minimum a yellow light . . .