not preventing something from happening is synonymous with allowing it to happen. there's no neutral ground between consent and non consent- they are absolutes.
again,
allowing it to happen is different from wanting something
back to the previous example of a mugging, i would
allow them to take my wallet, because i was pressured into it; that doesn't mean i want them to take it
similarly, in a loveual harassment/assault case, someone could feel pressured into allowing something to happen (due to overt threats, social pressure, a difference in authority, not seeing resistance as viable, et cetera) without wanting it to happen.
Wanting and allowing are different things. The law doesn't care what you wanted, it cares if you consented. You could say yes and really mean no inside, but all that matters is that you allowed it to happen. if you don't want it then it's your responsibility to communicate that so the other party understands
Exactly.
Consent is not based around the idea of allowing something to happen. It is based around the idea that two (or more, I don't judge)
people are agreeing to do something they both want to do. Obviously, in the absence of coercion or threats, you can't go back and say "well I said yes but I didn't really want it," since the initiator could have been reasonably sure that the other person was being authentic.
Also, something I haven't mentioned yet is the fact that groping somebody (as Annoying Orange admitted to doing) generally occurs in just a second or two. That's not necessarily enough time to react and stop something from happening, and social pressure could prevent people from making a fuss afterwards.