What does it mean when someone apologizes in advance for a drunk text?

Basically me and a guy friend(kind of) were texting recently about a game that was on . He was in the bar watching it I was at home. Anyways he text "I'll apologize now for any text I might send you later". Needless to say he texted me later, flirting!So what does it mean?
What does it mean when someone apologizes in advance for a drunk text?
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