How many gays does it take to put in a light bulb?
Only one... but it takes the entire Emergency Room to get it out.
Light Bulb and ER Visit
Explanation
This is a play on a common 'how many does it take' joke format. Instead of focusing on the installation, it makes a crude joke about the removal and makes use of a stereotype. The punchline suggests the gay individual got stuck while engaging in sexual activity, thus requiring emergency medical assistance.