no.
It should be capitalized if it directly precedes someones name.
Only is they are in the begginning of a sentence of someones name such as the name AUTUMN.
A polite way of referring to someones obesity.
Look at the death certificate
Iris.
It is referring to a person that owns or drives a Toyota.
their birth certificate / ask them / ask their friends / ask their family
Capitalizing specific letters can emphasize parts of a phrase or give it a unique style. In this case, the capitalization of "Cool Guy" may aim to make the term stand out or convey a sense of importance or coolness.
Sub is used on Twitter when you are referring to someones tweet but you don't actually retweet the tweet in question. It's mainly used when everyone understands who you are referring to.
Euthlesia is not a word I am aware of, you may be referring to euthanasia, which is the concept of deliberately ending someones life in order to relieve pain and suffering in a legal way.
Seasons of the year are capitalized when they are used as proper nouns or part of a specific event or title, such as "Spring Festival" or "Winter Olympics." They are not capitalized when used descriptively or generally, such as "the winter months" or "enjoying the summer weather."
in someones cuchi in someones cuchi in someones cuchi