One partner reads, wonders and wants to try things. The other is content. Neither is wrong, and the gap is workable — but only if the more curious one stops treating it as a campaign.
Pace is set by the more cautious person
Any other arrangement produces reluctant participation, which nobody actually enjoys and which poisons the next suggestion.
Curiosity is not a complaint
The cautious partner often hears "I want to try this" as "you are not enough". Saying explicitly that it is not helps more than you would expect.
Separate the wanting from the doing
Talking about something is often most of what the curious partner is after. That is available without anyone doing anything.
Some gaps do not close
Occasionally the honest answer is that one person will not get everything they want here. Naming that plainly is better than a decade of hinting.