This is going to seem like a really strange question but....?

Question

I'd really like to know, just out of curiosity, and I had no idea where to place this question so I'll hope I can get the answer from science.

When it's cold outside, we can see our breath. I'm not sure of the fundamental reasons behind this (you could explain that, too), but I was curious as to why we can't see it when we..you know, expel gas (from the rear end). Can anyone explain this to me?

I know it's silly, but I'd like to see the explanations. I'm not a scientist! =)

Answer 1

The key is moisture content.

In effect, when you breathe warm, moist air out of your body, it contains some amount of moisture. BUT as soon as it exits your body, the air temperature drops. The cooler the air, the less moisture it can hold. Thus, you get atmospheric condensation of that moisture. In effect, a micro-cloud.

The other end probably involves drier air, though other gases are involved that would have different moisture capacity.

So... are you SURE you don't form clouds at the other end? They would only be transient. Perhaps you should get someone to help you with an experiment by being your observer. Of course, for the experiment to be correctly designed, your nether end should be naked in the cold.

Of course, if your mom happens to catch you at this, I'll deny it. When your mom yells at you for shining the light of the silvery moon, don't blame me.

Answer 2

if you tried farting on a cold day without your pants on you might be more successful. i reckon they´ll keep the majority of it getting out.. if you try it and fail it might be to do with the lungs having a moist lining, while one of the roles of the digestive system is to absorb water.
but i´d still expect water vapor in your farts, since you dont cr@p powder, so i´d expect you to see it.

try it and let me know how you get on ;)

Answer 3

I have no proof it's true. But I assume the rear air has methane and/or hydrogen more than water vapor.

Answer 4

hahaha! nice one.


I don't know, maybe because your pants are in the way!!
hahha