The choice may be the first alternative available or simply one picked without analysis or ordering. When you need to use a towel, or put clean sheets on the bed, or choose some fruit to eat, you might decide that any will do. It certainly makes the decision easy and simple. Analysis requires a lot of mental effort, and some people, especially those who spend much of their working lives performing complicated analyses, want to reduce the level of analysis in the rest of their lives. You will sometimes see them walk into a stationery store and rather nonchalantly grab a notebook or pad to use.
Random choice can produce a fun adventure in restaurants, too.
In this technique you attach yourself to a preexisting decision stream and accept the decisions that most other people have made. When most other people in your subgroup have put on acid-washed jeans, you do too. We like to think of ourselves as rugged and independent individualists, but in reality we adopt many pre-made decisions through social conformity. This technique is used by those who want to appear to be making decisions. It is easy and automatic, just like conformity.