Why ar? Means what ar?

Have you ever encountered a situation whereby you message somebody something, and they keep asking you why? OK, I mean for normal situations, that would be fine, but have you ever encountered a "Why..." when you type "hehe"?

"hehehe"
"Why hehe?"

-.-

And have you ever encountered a situation whereby you want to end a message, or you simply have nothing to say, so you go, "ohhhh" or "ahhh" and people ask you what does that mean? OI don't get horny.

"ahhhh"
"What does ahh means?"

-.-

Seriously, is there so much to ask?