Grammar 101, ... or, pet peeves Options

[agrippa]

Here's a place for us to bore eachother to death about grammar. I'll go first.

I. POSSESSIVES AND PLURALS

Most nouns are made plural by the addition of 's' or 'es'.
computer -> computers
house -> houses

Some nouns have irregular plurals.
mouse -> mice
fish -> fish

A noun is never made plural with an apostrophe.

The apostrope and 's' are used to show possession.
Ron's (belonging to Ron)
Ginny's (belonging to Ginny)

However, pronouns have their own possessive forms:
his (belonging to him)
hers (belonging to her)
theirs (belonging to them)
its (belonging to it; it's means 'it is')

[agrippa]

I am still told to say "Might" instead of "may" because it's more polite. So I do. As in, "Might I have another one?" Of course, they always answer with, "You might... but no." It's very irking.

Isn't "might" just the subjunctive of "may"? (That would account for it being considered "more polite").