Any note of compulsion or coercion and its rape.
Yes I do consider childhood seductions rape too. I do consider adults courting adolescents inappropriate and any sex occuring likely to be tantamount to rape also. No excuses.
To be honest I always find threads like this a little detestable in so far as they appear to always raise doubts about the idea of rape, it seems to be their entire purpose, similarly with debates about the age of majority or age of conscent to sexual acts.
Here's how I see it, there are serious questions if someone is seducing people so much their junior as to why they need to do so, why cant they have relationships with their peers? Likewise why would anyone need to employ such tactics as the others mentioned to have sex? Is it even sex?
I ask that seriously because even if its not legally proven rape, I would not qualify any of that behaviour as sex, its beyond selfish, it involves objectifying the other and its something like masturbation using another's body.
That's the least disgusting description I can think of for it and it reminds me of the bit in Hitch when Will Smith's character puts the smack down on the guy who I suspect represents the majority of the PUA readers and players and questions whether he even likes women.