Nico greetham

IMO because he’s a cock-tease and he gets off on gay men admiring his body

Agreed. Just a footnote to the last pic in #1906 above: the other man is a muscleboy Paul Forman, based in London. He’s an Anglo-French wannabe model/actor with a good body. Despite his erratic and modest income, he’s been seen on exotic vacations in the company of older men.
he follows best_of_grindr account on Instagram. That probably confirms that he is into men.