This thread is fucking excellent.
1) you hypnotize someone into having sex with you
Yeah, but would they remember it?
2) you get someone drunk so that you can manipulate them to have sex with you
Unequivocally rape, but again, would they remember it?
3) you have sex with someone controversially younger than you, but they consent
Not rape unless they can't really think for themselves.
4) you manipulate someone into having sex with you when you know they'll regret it later.
No, but it depends on the degree of manipulation and how much the consenter initially wanted to have sex in the first place.
5) you threaten to withdraw support for an individual if they don't have sex with you (not support that they need, like a job, money for living expenses or healthcare, but some other type of support that they can survive without)
Not rape because it isn't forceful, merely coercive.
6) you threaten to withdraw support that the individual does need (such as those listed above)
This is rape because it's forceful, i.e., takes away services or things one would need.
7) you make your spouse have sex with you after they have been witholding it from you
Rape.
8) someone has consented to have sex with you. you're in the middle of things and they say "stop!" and you don't
Rape.