A father was very proud when his son went off to college. He came to tour the school on Parents’ Day, and observed his son hard at work in the chemistry lab.
“What are you working on, son?”
“A universal solvent, “explained his son. “A solvent that’ll dissolve anything. “
His father whistled, clearly impressed, then wondered aloud, “What will you keep it in?”
This joke is included in the Black Book of Jokes. You can order it from here.