Whether it be online or reality, I'm honestly rubbish at detecting sarcasm.
I just take things seriously the majority of the time.
My boyfriend always teases me that I can never understand his 'jokes' or that I never follow his lead when he teases his mum. I've told him once to give me a signal whenever he's being sarcastic to someone so I can follow along. But that sort of defeats the purpose of the sarcasm and seems silly in the end, imo.
I feel like that also applies to this....