It was a poor film. You're not allowed to look otherwise "it" will kill you. But they peek every so often. If the birds give a warning when the creatures are around, then what's the point in the blindfolds? They were laughing and joking a couple of days after their family and friends were almost certainly dead. It took the main 2 characters 5 years to have sex? The children were about 5 years old when they first slept together, yet the sexual tension was there when they first met. I could write a better script than Bird Box... in fact I think I will go and do that now.