well, a dildo is an object while a hooker objectifies herself. but i think there are lots of differences. and can't really be comparable.
Women:
1. Is it better to use a dildo than to masturbate manually?
sometimes, depending on my mood. i only use it when i'm really horny or want to treat myself.
2. Is it better to use a dildo than having sex (ofcourse the performance of the partner is a big variable here, but I'm looking in general terms)?
i haven't had good sex yet. so i'd say dildo
3. What are your thought on the use of sex-toy's such a dildos, vibrators?
i say they're a healthy part of sexuality and shouldn't be something you should be embarassed about getting. they work wonders and i've no problems with it ^.^
4. Do you think it is natural/normal/healthy to use a dildo?
seee above
5. Is it compareable to the use of an inflatable lovedoll?
never used one so i dont know
6. Is it compareable to the use of a prostitute?
definately not. a prostitute isn't do it yourself.. there is another person involved so it changes everything
7. Could you lable using a dildo as cheating?
no
8. Do women use dildos as a replacement to sex?
probably. depends on the individual