My girlfriend and I tend to get takeout from a calzone place in town called DP Dough. It's great stuff, but one day they gave us a bumper sticker that simply said "I <3 DP" and the web address on the bottom. Of course, we always laugh like children because we get the double entendre and are perverts. That's why I felt Roxy might have a shirt with that very sentiment. I got this as a part of a chibi stream that TK was doing a while back, definitely during the time of Roxy still being a pretty new character for me.

Roxy (C) (design by me and bunnybones)
Art (C) (original here)