(Why do bears say “woof”? The most likely answer is that the snurfling sound a real bear makes can be written as “whurf” — half growl and half snort — which easily transcribe into “woof”. Alternately, start from the greeting “Yo, dawg!” and follow that path to get to the same destination.)
Of course, one person’s “Hi, I think you’re hot” can be another person’s “Hi, I think you’re hot, let’s have sex now.” Take this exchange from Adam4Adam this past weekend for example. (Of not: the guy’s only profile picture is a side shot of his dick, and his profile text is equally sparse: “Not looking for love or anything other than getting my cock off. Blowing a load”. Occasionally you can check out the profile and respond to a tersely worded potential sex request. But not with this one, and especially not when I tend to be looking for kinky fetishy sex partners and the profile indicates nothing of the sort.)
him: Woof!And he blocked me. Whatever.
him: which translates as "no thanks?"
me: "Woof" doesn't usually translate as a specific offer. I'm not available until later tonight anyway.
him: yeah, good luck with that
If you want “Woof!” to mean more than “Hi!”, that’s great. But you’d better be ready to follow it up with an offer and specifics.