['It's an acquired taste' sounds too much of a practiced cliche, but he remembers being Slaine's age and trying coffee for the first time, right after overthrowing CGS, of all times.

The expression of well deserved distaste on Slaine's face prompts a smile out of him all the same.]

You get used to it, but it's slow torture at first. I can't see why it's a luxury on Mars, but the stuff is kind of addictive.