Is it very common?
If I search "Beej" on Google without Safesearch enabled, I get 14.3M results, if I turn on the Safesearch filter, it still returns 14.3M results.
If I repeat the same experiment with "blowjob", it's 1.5B results vs 23M.
If I search for "Beej" on Bing with SafeSearch Off, I get 2,840,000 results, while with Safesearch on Strict, I get 2,800,000 results. I couldn't search for "blowjob" at all with Safesearch on Strict.