My Kink and My Partner's Limits

Hey there! I'm a grad student and been with my partner, Alex, for about two years now. We've had a great time exploring our kinks together, but lately I've found myself wanting to try something new that I know Alex isn't comfortable with yet. To give you some context, Alex is really into light BDSM play, the kind where we're both fully clothed and it's all about power dynamics and verbal role-play. For me, I get a huge kick out of more tactile sensations; I love feeling every inch of someone’s body against mine. The idea of being completely naked with another person, skin-on-skin contact, is incredibly arousing for me. Recently, while we were cuddling after making love in the usual way, it just hit me, how much I want to try some form of intimate spanking play where there's a real physical connection. You know, not that harsh stuff that hurts or anything, but something more like soft taps and caresses followed by gentle kisses to soothe. The thought got me really worked up, and Alex noticed my shift in mood. I explained what was going through my mind and how it made me feel so turned on just thinking about it. We agreed we should talk about this more when we both aren't as amped up from recent sex, but it's been eating at me since. I know this isn't something Alex is ready to try right now, which I respect completely. But the curiosity is there for me. Have any of you ever tried pushing the boundaries with a partner who’s not quite on board yet? Is that normal, or am I just being selfish wanting to explore these new things? So... thoughts from the community? Any advice for me in how to approach this delicate situation?