#3 is never said in the movie
however, It's in the script tho. Tappy says, "this drives most people crazy" and it's "no orgasms"
No sex in other words

heh
Tyrone threw up from withdrawl from drugs and the kind of home sick / crap feeling you get when you're in a jail with a bunch of hicks. Kind of like when Marion throws up after screwing that guy she hated. Nothing physical, she just was so so so uncomfortable that she couldn't take it.
The point of Tappy coming into the house is very obvious. She dreamed of going up there and being basically a different person when she was up there. She dreamed that everyone would like her because she was that different person but she wasn't happy with who she really was so she was having a nightmare (due to her not eating) of her dream turning around and embarrassing her by exposing who she really was.
The point of Tappy making out with her dream self is a little subtle but kind of obvious when you think about it. All day, she watched Tappy so her sexual attraction to tappy was never obvious but I don't think she could've watched him all day if there wasn't any of that type of attraction so her image of herself was making out with Tappy because her image was better then her. In other words, her true personality felt like crap while the personality she wished she could be was doing only what she could dream of.
Oh yea: LOL, they got arrested because the doctor could tell they were junkies so he called in the cops heheh.
That's all