Kennen is used when talking about knowing people, e.g. Ich kenne Jon Schnee (I know John Snow), or knowing about something, e.g. Ich kenne nicht viel über Filme (I don't know much about films).
In this case, Wissen is used, because we're talking about knowing facts, e.g. Ich weiß alles!. It is also used when a subordinate clause is used, e.g. Ich weiß, dass zu viel Essen töten kann (I know that too much food can kill), or Ich weiß, dass du schau bist (I know that you are smart).
Ich hoffe, dass das hat geholfen!
you go to the library in dresden, you wanna read Nietsche but they only have one book left and there is a boy from Germany wanting the same book at the same time. But thanks God to Duolingo you offer the solution saying "Zu dir oder zu mir?" Than you have a green tea with no sugar, some reading and you say "Tschuss" and both of you go to sleep before elf
It is intriguing to see this sentence come as part of romance vocabulary. I think it reflects personal views more than typical german approach to romance.
If I may share mine too, I believe there are other ways to get to know each other deeply and build an intimate and rock-solid relationship that do not necessarily invoke sleeping together during dating.
You cannot always count on the clues for the simple reason that most words in any language can mean a lot of things. Dir and mir here specifically mean 'to your/my place'. English uses a different phrase -- and a somewhat more explicit one -- plus dir and mir are dative pronouns so they are used all the time without any reference to someone's place. You just have to know it in this case :)
indirect object is the dative form. I am brushing my teeth with a toothbrush. The toothbrush is the indirect object (dative). The toothbrush isn't being brushed. The teeth are. There are, as I'm learning, several verbs that always make the object indirect (or dative). This will confuse, but just be aware.
Toothbrush isn't an indirect object in this case. It's not a direct object either. Indirect objects show to whom or for whom an action is done. Your sentence doesn't have an indirect object. However, the German preposition "mit" takes the dative case. Your sentence would therefore be "Ich putze mir die Zähne mit einer Zahnbürste." BTW you use "mir" in German because it indicates to whom or for whom the brushing is being done.
Someone at work referred to a meeting we had as a date ("when is our date?"). I wasn't sure on the location so I jokingly wanted to use this line instead of asking who's office we'll be in. Would it be terribly inappropriate? Is this sentence very one track minded, or can it be used more innocently?