Slowdays

Three girls are sitting around, totally bored so one girl suggests that they make up nicknames for their ideal boyfriends and name them after soda pops.

"I want mine to be 7-Up, 'cause 7 days a week he's up."

"I want mine to be Mountain Dew 'cause when he's in between my mountains, we'll be doing it."

"Mine's gonna be Jack Daniel's."

"You can't do that. Here we are talking about soda pop and you're talking about a hard liquor."

"Exactly."

I don't think I ever got this one.

I see two possible interpretations for this one:

a. hard liquor is simply more bad-ass and manly compared to soda pops, and the other girls unwittingly admit it

or

b. in the vein of "mountain dew (doo)" -> "we're do(o)ing it", "hard liquor" could become "hard licker".

Dunno, either way it's not very funny

Yea... both are fair interpretations of course. I just personally can't apply any connotations to Jack Daniel's.

Perhaps it is just a bad joke but I am losing sleep over it

Well the only reason for it being Jack Daniels is the 40%+-ness then

How mature!