Most social groups I'm part of would consider puking to be a serious failure of self control. Most of the male-dominated groups I've been in would view crying the same way. I think that one is really "know your audience".
Unfortunately, I would argue that what you describe is a negative property of the groups you hang out with, and that your efforts would be better spent developing strategies for displaying tolerance when someone inevitably pukes or cries in order to start changing these group attitudes rather than ... training your body to never puke or cry.
I'm not as smart as I like to think I am. Knowing that, I've gotten into a habit of trying to work out as many general principles as I can ahead of time, so that when I actually need to think of something, I've already done as much of the work as I can.
What are your most useful cached thoughts?
A few of the rules-of-thumb I've already pre-cached include:
That should be a reasonable but not overwhelming sample of the sorts of ideas I mean, and am hoping to evoke more of with this post.