Someone very dear to me told me that the most important part of assault is unwanted and unconsented, it doesn't matter if they do it to a hundred people and all of those people were alright with it, the most important part is whether you are alright with it or not.
It doesn't have to be in a sexual context either, even a hug falls under assualt if you have already said no or if you have clearly shown that you are uncomfortable with it. Can you report a hug as assualt? No, but I feels like it's good to keep it in mind anyways.
Consent is also not continuous, you are allowed to pull back your consent, especially if the conditions changed but even if they don't. If the conditions changed, please remember to update the person whose consent you obtained.
Consent at one point of time does not mean that it is consent for the same action at a different point of time. Lastly, consent is not transferable, therefore consent for Action A is not consent for Action B.