No person puts their head in a bag, but finds it ordinary to put their head in a shirt. People only want to venture into feats they know the outcome of. If you know the end of your shirt has a hole so you can come right back out, one without hesitation places the shirt over their head. Now can this be applied to a greater concept? If this is a natural behavior possessed by humans then why do we constantly jump into relationships. All relationships end. Everyone doubts that their relation with another will end, but this is just the idea of the hole in the shirt. You convince yourself of what the outcome will be. When were able to look at the simplicity of putting a shirt on were able to understand how simple relationships are. They come and go. Nothing to stress about.