I don't know what comfort sex is, but when I'm depressed I'm usually not thinking about sex, believe it or not.
None of the above, if it's not from someone I LOVE and am in a committed monogamous relationship with. When I'm feeling low I cook, tend the plants, chat with friends and go out.
Honestly, I'd like a kiss and a cuddle. Not sure what order, though.. heheh. It really means the world to me.. makes me feel so much better.