Scary outside at night

Riggs gets so paranoid when you take him outside after dark.  His eyes get all wide and he is on constant alert.  Looking all around, listening intently and dang near impossible to get him to focus on peeing and pooing instead of worrying that something is going to come out and get him.  How did we end up with such a wussy dog?  Maybe I should have named you Scooby Doo.