I still lack knowledge of Mass Effect 2 as I haven't played it, but I'm wondering if it has anything to do with innuendo.
I'm noticing a trend here. You need to play the game to get the joke.
Those pods melt people down into some liquid metal to construct something I will not name for spoiler purposes. If you go straight to the collector base after your crew is abducted, you watch some random colonist Shep never actually sees beforehand get melted. If you richard around and do other missions beforehand, it's your Yeoman who's been there the whole game who gets melted.