Even certain professors, who are supposed to be immune from commercial inducements are sometimes financially overcautious. A party of tourists were watching Professor X as he exhumed the wrapt body of an ancient Egyptian.
Judging from the utensils about him, remarked the professor, "this mummy must have been an Egyptian plumber."
Wouldn't it be interesting, said a romantic young lady, "if we could bring him to life?"
Interesting, but a bit risky, returned Professor X. "Somebody might have to pay him for his time."