Right! Well my mom always reply with this and so with my friend's mom and stuff, so yeah. It's probably a mom thing or something. But not all. Of course! I will seriously reply with this anytime I feel like so. Hahaha. Not with mom though. LOL. She'd be like "WTF" for sure. Positive. Just saying. I love my mom. Just other people. Or it actually depends. There are just some people who I don't want to talk to but need to and stuff. You know! LOL.
Like, with my mom, she would actually reply with "K" whenever I ask her for permission if I'm going somewhere and stuff so yeah a "K" reply in that sense is mostly welcome. Yup. Have a good day. P.S. I'm not a teenager.