It also takes more skill and time to make male clothing that looks authentic, while skin-tight slutwear can be thrown together in a matter of hours. 

And until G2M/M6 came out, pretty much all the male figures available are just awkward and goofy lookin, not very inspiring to build clothing for and difficult to make them attractive.

There's more male clothing being created now than before it seems. Maybe that's because the slutwear market is reaching its saturation limit.

 

~Shane