Hey, I'm just looking for someone to chat with.
Do you just want a casual chat or a more serious one?
I'm just hoping to have a casual chat. I don't want anything too serious or intimate.
It is normal to want some human interaction. Not every interaction has to be deep or serious, sometimes it is good to just find someone to have a light discussion with.
Light discussions are fun. I like making sex jokes over text with those.
Jokes are fun, but it's important to know your audience. Some people don't like sexual humor and feel uncomfortable when it comes up unexpectedly. It's also important to get consent before sharing  explicit sexual content, even as a joke.