I wasn't the one to ban your spray, but this might answer your question:
"
Bad Sprays: We don't accept any racist/porn/violent/disgusting sprays, we have young players on our servers, we don't want them to see such things."
However: "
Non-punishable infractions: Light porn spray:
Nudes sprays are tolerated if they don't show the genitals."
If you want it unbanned you can make an
unban request.