I think it just means that if you have the opportunity to surprise someone first, then you are no longer able to be surprised by that person. You're now expecting it. It means to get the jump on someone.
I don't know about first and second, but i do know the red scare was a great fear of communists in the 1940s or 50s. Poeple lost their jobs or were sent to prisons due to little suspicions.
Pokerface means dont show emotion so pokerface is kind of like no emotion is the key to everything
The whole song is about a girl (Lady Gaga) loving a boy but fighting with him and telling him to...