It's called 'Eco Sexual'... those that find nature sexy and get a kick out of having sex with nature. I'm not kidding... those that get a joy out of F-ing a tree hole (for male), tree stump (for female) to masturbating in water, under waterfall, etc etc
Currently, over 100,000 people have identified as eco-sexual in the UK - better add that E to GQBLTNFUKAP (gay, queer, bi, lesbian, trans, non-binary, fluid, unsure, cisgender, kinks, asexual, pansexual)... it's now, GQBLTNFUKAPE