What causes soggy nose blowing?

People talk about blowing their nose and at times say stuff about it being soggy. Why is this the case?

Anonymous2015-12-27T16:05:43Z

Soggy nose.

?2015-12-27T16:09:42Z

I believe that is a symptom of HIV.

Anonymous2015-12-27T16:02:50Z

eating boogers.