Lovers and then some

Last night, after we made love, Z and I lay in bed and talked.
Among other things, we talked about my other sexual partners and how he felt about that.
The short version would be while it's not what Z would choose for me, he understands how I feel
and what's motivating me (curiousity, lust, enjoyment) and he accepts it.
I think this is incredibly generous.
I also feel relieved he doesn't think I'm shopping to replace him (I am not).
And that he knows I am not going to have the kind of D/s relationship with anyone else I have with him.