#couple
Defined as:

noun:
couple; plural noun: couples

1.
two individuals of the same sort considered together.
"a couple of girls were playing marbles"

a pair of partners in a dance or game.

MECHANICS

a pair of equal and parallel forces acting in opposite directions, and tending to cause rotation about an axis perpendicular to the plane containing them.

2.
two people who are married, engaged, or otherwise closely associated romantically or sexually.
"in three weeks the couple fell in love and became engaged"

3. INFORMAL

an indefinite small number.
"he hoped she'd be better in a couple of days"

verb: couple;

3rd person present: couples

past tense: coupled

past participle: coupled

gerund or present participle: coupling

1.
combine.

"a sense of hope is coupled with a palpable sense of loss"

join to form a pair.
"the beetles may couple up to form a pair"

2.
mate or have sexual intercourse.
"as middle-class youth grew more tolerant of sex, they started to couple more often"

#Discourse of the use of the word/phrase in this particular case

You

"how many would you like?"

Them

"just a couple."

When someone requests 'a couple of...' I respond with something similar to: 'How many do you want specifically?', which leads to the discourse of, 'A couple is two, a few is >2, several is <x' and so on.

I agree with the first two clearly stated definitions of 'couple', but in the informal use of a couple (eg. a depiction of a quantity) is not specifically two...nor is 'a few' three. How many specifically is several..?

I understand the semantics within the conversation. But, the expectation of understanding that two, and only two, is implied in the use of the phrase 'a couple' in a request; is ambiguously stating what one party desires. I'm the asshole now, just tell me how many you want.

And now...your thoughts, please.

A long time ago I had noticed a trend developing on reddit where people were starting to preface their comments with: "I for one". It's pretty insignificant, which is why I never made a post about it at the time. Since then, its use seems to have spread significantly on the site and I've seen it a bit here as well.

It makes sense to use the phrase when talking about or quoting another person to help separate their opinions from your own. The weird thing is many people now seem to use it when its not ambiguous that the comment is their own opinion. I was under the assumption that the default position should be that the comment is the opinion of the person that posted it.

For example:

"I for one, prefer dark chocolate over milk chocolate."

Is the same as:

"I prefer dark chocolate over milk chocolate."

There's nothing wrong with using the phrase, it just reads like someone trying to pad out an essay for school.

Have you noticed people using the phrase on other sites? Is it a phenomenon more specific to reddit?
Do you use the phrase yourself? If you do, what is your thought process when typing it out?