"I need to commemorate this shopping experience for all time."
There's a theory that we actually look our best when we feel our best. And we feel our best when we're doing the things that we love. The things that make us feel most alive. That's why people always tend to look their best in photographs when they're laughing with friends or smiling with their family, hiking through the mountains or chilling at the beach.
So, this young woman was probably thinking something like, "Nothing feels better than getting a great deal on a plus-sized latex phallus. I should snap a quick selfie and post it to Twitter." I totally get it.