The text is a play on the well-known phrase 'You can lead a horse to water, but you can't make it drink', substituting the context of leading a horse to water with sending someone to college, and the action of drinking with thinking. While it is a clever twist on the original phrase, it does not exploit different meanings of a word or similar-sounding words for humor.
You can send me to college , but you can ' t make me think .