There's a technical term for it, cuttlefishing. Cuttlefish like many animals have a dominance hierarchy, where a dominant male has access to all the women in their group. So some submissive males will camouflage themselves, to look female on one side which it shows to the dominant male so it isn't perceived as a threat, then show its true male self to the women in the group to signal sexual availability.

Awful lot of guys cuttlefishing nowadays with a variety of different methods. "I'm asexual, but m-maybe it'd feel good with you"