No, not Afghanistan again.
As I have indicated before, I am a big fan of How I Met Your Mother. It fills the niche that Seinfeld occupied--comparative social theory testing. But, of course, just as Seinfeld strained believability with much of its stuff, HIMYM has a basic problem with the premise--a father telling his kids about how he met their mother. The video below illustrates this quite well--that the story is taking a long, long time to get to the mystery that the kids already know the answer to (unlike the eminently re-watchable Ryan Reynolds, Abigail Breslin, Isla Fisher movie--Definitely, Maybe) and includes a bunch of material that one would not tell one's kids.
Not that there is anything wrong with that.