Can you send ERC20 without ETH?

I've been dabbling in the cryptocurrency world and ERC20 tokens particularly intrigue me. However, I've encountered a bit of a confusion. Can I transfer ERC20 tokens without using ETH? I've heard that ETH is often involved in transactions related to ERC20 tokens, but I'm not entirely sure if it's an absolute necessity. Could you clarify this for me? I'm trying to understand the mechanics behind these transactions and whether there's a way to send ERC20 tokens without necessarily involving ETH. Your insights would be greatly appreciated.