is wolfwood naturally flirtatious? debatable. too explicit, noticeable. is he prone to being annoying as hell to people he feels affectionate and/or protective of? absolutely. he is torturing that plant

i think this goading extends to when they actually try to have sex btw. vash doing to facial microexpression equivalent of handwringing -> wolfwood goading him for not taking what he wants when he has him willing -> rip wolfwood weathering the flood of that dam breaking