Euphemism for kinky sex, involving, but not limited to, urethral probing, anal fisting and partner-swapping.
It is a common practice to request kitchen tile sex to your sexual partner via voice-mail.
The fetish of floor tiles. Originating from a 4chan thread where the op admitted to getting sexually aroused by tile patterns and saving pictures with different patterns for masturbatory purposes.
Having a fetish for floor tiles isn't abnormal at all imo. I'm sure a lot of normal people share this fetish too.