My DP was working with a new collegue the other day and they were having a chat, getting to know each other blah blah... when his collegue found out that we were unmarried and living together he said we were living in sin and should think about the consequences of what we were doing ie pre-marital sex 
Now i laughed this off when my DP told me, couldnt care less what a stranger thinks of me, but it got me thinking how common 'living in sin' is and if it is widely acceptable in society now?
AIBU to think you are a bit bonkers brave to get married to before living together?