The importance to question twenty three can be calculated in measures of life and death but rarely is that extreme. Could be considered as important as the Council of Trent or landing a of the lunar module on the moon.
I think it is best we examine the question in parts.
The first section, What is, I believe is self explanatory but I added a hyper link any way. The second part, Captain, Captain Morgan, the preferred is the Spiced Rum, but others in their wacky tastes might go with some other not as good flavor. The next part is coke, truly Coca Cola is the best but may be substituted with other varieties. This falls into the category of why fuck up a good thing. The last part, in a tub, is a carry over from a couple of generations ago, it is the use of a large usually wide glass with no stem. The idea is to get rid of the stupid shit so one can enjoy the drink. This can be especially helpful if you have a large nose.
This is an obvious addition that there should be no junk in the drink. Junk refers to fruit and vegetables. Some people not really interested in the drink believe having junk in their drink enhances it, but in truth they really look naive and probably should be beaten with a wet noodle, something to match the brain power.
This post is not meant to offend anyone, but if it did there are people that can help you and you will win a jacket that will be your last jacket you will ever wear.