Interesting! I am female, who also has exercise-induced asthma, and I too always seem to have a TON of saliva gather in my mouth when I run! Nothing else to do but spit, and it is SO embarassing, espcecially as a woman!
I really find it disgusting when men spit (for no apparent reason, that is). I am SO glad that my DH doesn't feel the need to spit. I think in the 10 years we have been together, I have seen him spit MAYBE twice.