Student or Learner
I think definitely it means it removes or gets rid of any romance from something, but is it common? Do you use it for other cases as well?
bride- I don't want wake up in your bed on my wedding day
It sucks all the romance out of itgroom- Hey. nothing can suck the romance out of our wedding
bride- I'll just be relieved when the ceremony is over
It's not just romance- it's a more general idea- like sucking the life/fun/good out of something, etc.