[Potentially NSFW] What turns you on?

The concept of “turn-on” here means a lot, depending on how you view it. It can be SFW or NSFW – but not necessarily the classic “makes you sexually excited” or “attracts you to another person”.

I’m wondering what makes people excited to be alive, what gets their heart racing and spirit singing?

So, what grabs your attention or piques your interest? What turns you on?