What’s a kink or fetish that you have?

Hello! I’ve always been curious about human sexuality and how people develop their kinks/fetishes of certain things.
I want to know if any of you have a fetish, paraphilia, or kink and when/why do you have it (no judgement to your preferences)
I’ll go first: I have a fetish for elbows and armpits which started when I was very young. I was obsessed with the Oder that armpits make and as a coping mechanism, I would smell my own armpits to comfort myself. As a result, I would need to smell body order of the armpit specifically to be aroused. As for elbows, it’s the texture of the elbows that aroused me: as a baby and toddler, I was told I would touch people’s elbows for no reasons and it just stuck.