@mnnewbie111
Some people don't understand that a couple LITERALLY means two. Bless! You're right, they're stupid and too lazy to actually explain
People are wrong when they keep insisting that a couple means two and nothing else.
Yes, when referring to a married couple, it means 2 because you've defined the number by using married. It's also a noun which means two.
If someone told you there were a couple of people waiting to see you, it might mean two but it could mean three or four. Here 'a couple of' is an adjective (hmm, I think) and means a few or an unspecified small amount.
But if they said there was a couple waiting to see you, you'd know it was two people and they'd be connected in some way, not necessarily married. Here a couple is a noun and is defined as two.
If someone was asked if Tesco was busy and they replied, no, there were only a couple of people in, we wouldn't think they had counted and there were literally only 2 people. We'd think there were very few people.
But maybe people think I'm a bit stupid or making it up so let me quote the Oxford and Cambridge Dictionaries.
Oxford Dictionary
an indefinite small number.
"he hoped she'd be better in a couple of days"
Cambridge Dictionary
two or a few things that are similar or the same, or two or a few people who are in some way connected.