1 - A gentleman has too much to drink and has trouble getting an erection at the lady's request and instead just falls asleep.
2 - A gentleman drinks some, but not too much. The erection arrives to the lady's delight and lasts much longer than normal. If gentleman doesn't cum during the exchange its ok. Blue Balls don't exist for this situation.
1 - "That whiskey dick just passed out on top of me, what an asshole!"
2 - "That whiskey dick is lasting forever!! What a gentleman."