The 1st couple of times I had punctures I couldn't fix them in the field. Replacing tubes at home involved at least 30 minutes of cursing, swearing, and general aggravation that made me excessively unpleasant company.
Evidently I've been learning a few things since then.
Last night, in a hurry, I replaced a tube in the field in about 10 minutes and was left wondering why it was so easy all of a sudden...
Not that I'm complaining mind you.
If you cannot see the causal relationship between "I have chocolate" and "Life is Good", you simply aren't trying hard enough. Pirates of the Burley Griffin