There should be a curvy 1 and 2 body type for male characters. And I'm not talking about the femboy body type, I mean, take the already existing female body types and replace the female breasts with the pecs of males.

It's mostly because when using those curvy body types with male characters, when the breasts level is set to 0.0 and I make their belly size bigger, the breasts either stay unnaturally flat (In the case of f_curvy1) or bent upwards (In the case of f_curvy2).