A scrap from yesterday's conversation.

[randomness]

Sex is communication. If someone is a bad communicator out of bed, it's unlikely they'll be a good communicator in bed. Possible, but unlikely.

Edit: A number of commenters have drawn a distinction between verbal and non-verbal communication, and assumed I meant "verbal=out of bed"; "non-verbal=in bed". That is not what I posted. I do find it noteworthy that people make that assumption.