>>2388213The attention to detail on this is great.
I love how it looks like Luffy is using some sort of Gum-Gum ability with his dick. It looks puffed up. Gum-Gum no Keigle Balloon, possibly. Squeezing his muscles to constrict bloodflow to his cock, engorging it up to twice it's normal size.
I can see Luffy training to engorge it bigger and bigger so he can fuck Giants and make them cum, too.