People often believe weird things due to cognitive biases, which are mental shortcuts that can lead to errors in judgment. For example, the confirmation bias causes individuals to seek out information that supports their existing beliefs while ignoring contradictory evidence. This can make unusual ideas seem more credible. Additionally, social influences play a significant role in shaping beliefs. When people are part of a group that shares unconventional views, they may adopt those beliefs to fit in. The desire for acceptance can lead individuals to embrace ideas that might seem strange or unfounded, such as conspiracy theories or superstitions.