Dominance is sexy
and spitting on someone is demeaning, so to spit on someone and have them go 'OooOoOoohh yeeeh baby *rubs nipples*' shows your dominance over them, because everyone knows women are just there for abusing and sexing.
According to my nan...
(
Tu9 01100011011101010110111001110100,
Sun 6 Jun 2010, 16:32,
archived)