Hate, because people hate on hatee's terms unlike with love, it also motivates people more.
Hard to say without inside knowledge, both are probably controlled by the group of people with real power.
Physical, since emotions motivate people more than logic. Kinds of rs is the only sensible interpretation of this choice.
Men are less anxious, empathetical and prone to social emotions as well as more intelligent on average.
While people hold science in higher esteem, than low level magic, for every statistical fact joe hears, he'll hear different thing the next day, while superstitions are able to parasite on people's worries. When I'm explaining how something works to someone and say "it only makes sense to do x as much, although I do y>x" guess what behavior pattern they'll adopt.
Money, cause it can buy everything in the world, including all the sex there is, when sex can only buy a very limited amount of money. Industry driven by people pursuing money is that much larger, than industry driven by people pursuing sex.