Great link from my buddy James, of RainGeek fame: 5 things you need to know about that wonder-beverage, coffee. If you read nothing but one paragraph here, read this one:
The smell of coffee makes women more likely to give out their phone number. Anything that gets the adrenaline flowing increases sexual arousal so coffee and a roller coaster might be an excellent date idea. When things get stressful coffee is a good idea for women but not for men. Coffee has also been shown to reduce depression in women. Pregnant women definitely should not drink it. (Alcohol — in modest amounts — during pregnancy can actually be a good thing.)