I guess for me the thing that's really crappy about this quote is that it shows his underlying attitude - that women are basically always potential romantic partners.
If he was into men, and he said he didn't want men in the lab because he might fall in love with them, you can sort of see how absurd it is, and how unpleasant it is to be the object of romantic fantasy when you're just trying to get on with your job.
If he was into men, and he said he didn't want men in the lab because he might fall in love with them, you can sort of see how absurd it is, and how unpleasant it is to be the object of romantic fantasy when you're just trying to get on with your job.