I mean, it's not as if I frequently go, "Ah! A short trip to the vomitorium would really hit the spot!" or actually look forward to throwing up, but when the contents of my stomach fancy a bit of fresh air, I usually head to the toilet to get it over with. So it feels to me like a slightly unpleasant task that has to get done, so you might as well go and do it. I'm also glad that I usually get a bit of advance warning when my mouth starts salivating.
Yesterday, I ate some rice and meat sauce that was a bit off and had to throw up on three separate occasions over the course of the afternoon and evening. Perhaps a bit like using the toilet for other uses: takes time out of the day but you feel a bit better afterwards.