"Mostly among women," Sparkle admitted, "or guys who are going for a certain look. I do it because it just makes me feel good. Bright colours make me happy, you know?"

He opened the cap on the bottle of nail polish remover and poured some of its contents into a cotton swab, putting the cap on the bottle again almost immediately.

"When you're doing this in the apartment, you might want to open a window," he added. "This stuff is foul."