My Late-Night Kink

I’ve been married to Jane for twenty years now. We both thought we knew each other inside and out, but last month I discovered an unexpected kink of hers during a late-night pillow talk session. It turns out she’s always wanted me to blindfold her while we make love, something that adds a new layer of intimacy and excitement between us. She seemed nervous at first but after trying it once, she was hooked. How common is this? Have other couples explored such playful dynamics?