User blog comment:Steven+Amethyst=SmokyQuartz/Luffy and Hancock have a daughter/@comment-25400375-20170203015729

To be honest, and not to sound chauvinistic, but I'm actually a fan of the Luffy/Harem pairing. Not a super massive harem, of course. Just a dozen or so, as long as it's even. When the time is right, I actually plan to do some stories that feature such a pairing that has a different composition depending on the story, but that doesn't mean Hancock and the canonical female Straw Hats among others will be left out.

In the meantime, maybe you can look over the works of Devlin Dracul on fanfiction.net. In the past year he's written about children of Luffy mothered by royalty, mermaids, minks, and other Pirates among other women.