The 31-year-old songstress, who is currently dating actor Orlando Bloom, was speaking at Children's Hospital Los Angeles' "Once Upon a Time Gala," reported E! online.
"I see the amazing thing of birth and children and the vulnerability and we just have to take care of them and how, how big of an impression we have. We have such a responsibility!
"Children to me are becoming a big focus. I don't even have mine but I see it in my sister's kids and just how much nurturing and love they need...," Perry said.
Perry also believes a second chance at marriage is in her future since divorcing comedian Russell Brand in 2011.
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