と来(き)たら ②

When used in the more literal sense, ときたら is a grammar pattern that means ‘when it comes to (A)’, or ‘concerning (A)’. It is a combination of the case-marking particle と, and 来(く)る combined with the conjunction particle たら ‘if’, 来(き)たら. This is not to be confused with the alternative translation of ときたら which is ‘that damned (A)’ when used for criticism.
ときたら will attach to the end of a phrase marking what the conversation is ‘concerning’, before that topic will then be explained further. In other words, (A) will present the topic, while (B) will indicate the speaker’s first instinctive thoughts about that topic.

• 夏(なつ)ときたらやっぱりキンキンに冷(ひ)えたビールですよ！
  When it comes to summer, as expected, a cold beer is the best!
• 寒(さむい)い日(ひ)ときたら、鍋(なべ)でしょう。
  For a cold day, hot pots (is the best), don't you think?
• パワハラときたら大問題(だいもんだい)になるのは当然(とうぜん)でしょう。
  When it comes to power harassment, of course it is going to become a huge problem.

For the speaker, (A) is usually something that strongly makes them think of (B). However, it may just be that the relationship between (A) and (B) is a thing that the speaker is implying as obvious, or that goes without saying. Due to this, the (B) phrase often begins with やっぱり or やはり ‘sure enough’.