For THAT girl... (answers in red)
1. ...let her take a picture of you naked?
If I were sure it remained private
2. ...get naked in a risky public place?
Possibly (depends how risky)
3. ...act like a little boy and call her "momma"?
Sure!
4. ...let her give you a spanking?
SURE!
5. ...eat her out until she has an orgasm?
Definitely 
6. ...masturbate in front of her?
Sure!
7. ...let her pee on you?
Yes.
8. ...strip naked in front of her friends (guys and girls)?
If only girls, no doubt. If also guys... mmm not so sure. But who knows
9. ...taste your own cum?
No.
10. ...obey a strict diet and exercise regiment for 3 months?
No.
11. ...dress up like a school girl with a mini skirt, stuffed bra, panties, wig and makeup?
No.
12. ...go without sex or masturbating for 1 year?
No.
13. ...let her tie you down first?
Sure!
14. ...shave off all of your pubes?
Sure!
15. ...dress up like a french maid and do chores for her?
Yes.
16. ...let her put clamps on your nipples?
Sure
17. ...cum on your own face?
No.
18. ...let her fuck your ass with a strap on?
No.
19. ...strip naked on a live webcam?
If not showing face, sure.
20. ...suck her gay friend's dick?
NO.
21. ...let him cum in your mouth?
Again, no.
22. ...let 5 or 6 of her girl friends fuck you with strap-ons and dildos while you eat them out?
No.
23. ...have a threesome with her and her guy friend (you give and receive)?
No.
24. ...be her sex slave for 3 months (she gets to do whatever she wants, mix between conventional sex and femdom)?
Sure!
25. ...be her bitch for 1 week (no sex, but a lot of dress up, chores, humiliation, and oral for her and her friends (guys and girls))?
Sure!