Here's why:
* Context is key: The offensiveness of "knob-head" depends on the context and the tone of voice used. It can be used playfully between friends, but it's definitely not appropriate for formal settings or with people you don't know well.
* Severity: Compared to other insults, "knob-head" is relatively mild. It's more of a playful insult than a truly offensive or hurtful one.
* Regional variations: The offensiveness of "knob-head" can vary depending on your location and culture. In some places, it's considered a common insult, while in others it might be considered more severe.
In conclusion: "Knob-head" is an insult that should be used with caution. While it's not as offensive as stronger swear words, it's still rude and disrespectful. It's best to avoid using it altogether and to find more appropriate ways to express yourself.