Okay, Let me start with a warning first, this sentence you have doubt about describes sex , more precisely kind of a rape. So pardon me if you find the answer offensive or a few words obscene.
It is quite okay to use the word beauty to describe a man. In fact Narcissus (from whose name the word ' Narcissistic ' is derived ) was referred to as a man of great beauty. So it is common in Greek mythology and in general, olden times to use the word "beauty" to describe a really handsome man.
To answer your next question. The sentence refers to 3 people in total
1) King Aethlius - father of Endymion (who is not a boy, but a man)
2) Endymion - son of King Aethlius
3) The moon - who was allured by the beauty of Endymion
You should be clear of the three people first.
Getting to the sentence. Let me break it up
"Their first king, Aethlius, was father of that Endymion" - means, Aethlius was the first king and the father of Endymion
"that Endymion whose beauty so allured the moon" - Endymion was very beautiful. The moon was "allured" meaning, powerfully attracted to Endymion's beauty. It is worthy to note, that the moon was only attracted to Endymion's beauty, not his character.
"that she closed his eyes in a perpetual sleep" - she (the moon) was so attracted to Endymion ,that the moon (referred to as "she" in the sentence) closed Endymion's (referred to as "his" ) eyes in a "perpetual" (never ending) sleep.
"sinned at leisure" - in olden times, and even sometimes now, having sex with a person without his consent or having sex with another person who is not your spouse or having sex with people who you should not have sex with (incest) was considered a sin (trust me, it is still a sin). So they referred to immoral sex as "sinning" (Remember angelina jolie's Original sin?). leisure means free time, or you can also mean, whenever you are free and relaxed. So "sinned at leisure" means, she had non-consensual sex with Endymion whenever she felt like it. Remember, Endymion is in an eternal sleep.The poor guy cannot protest.
"and had by him half a hundred daughters." - And had because of him 50 daughters.
Finally to help you further, I will just rephrase the sentence into simple terms
Their first king, Aethlius, was father of that Endymion whose beauty so powerfully attracted the moon that she closed Endymion's eyes into a perpetual/eternal sleep and had non-consensual sex with Endymion whenever she felt like it making with him about 50 daughters in the process.
'and' provides inclusiveness. by saying "A and B", it means BOTH A and B. you may use 'and' in positive and negative sentences.
'or' provides exclusiveness between choices. by saying "A or B", it means ONLY ONE between A and B can be considered. If you choose A, then it is not B. and vice versa. you may use 'or' in positive and negative sentences.
If you say, 'Lisa likes apples or bananas.', check the context first. The speaker here [in an imagined dialogue] is not sure what Lisa likes.
Best Answer
How people hear it
Usually if you say it without a pause before the and (or a comma in writing), like this:
then it would mean "don't do both of these activities together (or don't play video games and then immediately read a book) before you go to sleep."
Usually if you say it with a pause before the and (or with a comma in writing):
then it means two separate propositions: (1) It is best not to play video games, ever. (2) Read a book before you fall asleep.
There is no official rule, of course. And in this case, people will probably hear the second version even if you omit the pause (or comma). The reason is, playing video games and reading a book don't combine into an activity you could do before going to sleep.
As it stands, the sentence seems strange because combining those two activities without a pause doesn't really make sense, and recommending against playing video games ever seems strange, too. Why would someone recommend against playing video games ever, and tell me to read a book before going to sleep, all in the same breath? So, a fluent speaker will probably think that you misspoke, and that you meant to say:
Ways to say it clearly
You can use gerunds to make parallel constructions to help the listener connect the phrases correctly:
Still more ordinary is:
Notice the use of both gerund and infinitive to help the listener keep track of what is supposed to modify what. If you said "You should read a book before going to sleep, not playing video games", that would be heard as "You should read a book before you go to sleep, not before you play video games."
This next sentence is even more lucid:
The word you helps the listener follows this without confusion, because it puts go into the second person. It's not an infinitive, so the listener doesn't group it with read and play.
If you really want to recommend against doing either activity before going to sleep, then you would say:
People who know set theory or use databases like to say that English uses or to mean and here, but they're mistaken. The usual meaning of or in English is to indicate choices. In this context, it means "either choice you make, the sentence will be true."