lust
[luhst] Show IPA
–noun
1.
intense sexual desire or appetite.
You for sex with your spouse hence getting ‘excited’.
But whatever, this does not need to be talked about anymore. I see it for what it is: the actual definition. Subject dropped now.
No my friend, thats not how it works

I don’t want to argue to prove you wrong, but to make sure you don’t mislead others or justify your own lust if that may be the case.
Lust is a Seven Deadly Sin. What do you not understand? Is there a caveat? No. Because Lust is Lust. I think part of the reason for your confusion is that you think I am (or the definition itself) somehow detracting from and making sinful the feelings you may have for your wife. That isn’t the case at all - unless you are lusting after her.
Let’s take another example and apply it, to make sure you know what Lust is, but first let’s get the real definition, not the interwebz 30second google copy paste definition, which by the way you left out the other definitions in order to justify your own point, I see.
Lust is a strong, excessive, inordinate desire. Not only in Christian terms but in every day terms too. You don’t meet a pretty girl and say “I lust after you” because she will be repulsed. Lust is be it’s definition an excess and geared towards the self. That should already make it clear that it shouldn’t ever exist, even in the context of marriage - because marriage is not about the self. Getting turned on or sexually excited is not lust.
Let’s look at it from the point of view of say, food. Gluttony. Do we need to be gluttonous if we are starving? Are we gluttonous if we are hungry? No. Certainly not. For it is only natural to be hungry and to look at food and think about how tasty it is. Gluttony is the inordinate, excessive want for satisfaction coming from food. It is an unbounded, unrestrained and selfish consumption.
What about, say, envy, another deadly sin. If we admire someones new car, or their new house, or are pleasantly happy for them that they got a good job does that make us envious? No, certainly not. Because envy is the evil of wishing so much you had something that another has, that you wish evil upon them and you near despise what you already have.
Do you see the correlation and the point I am making?
You seem to think the Church (who only speaks from logic and natural law) is defining things as sins when they shouldn’t be. God, and thus, His Church, doesn’t make natural things sinful. If it were sinful to be excited by your wife then nobody on earth would exist ever.
The words though, don’t matter. Whether the word is “lust” or “floobydoody” it doesn’t really matter. What matters is the intent and the state of the soul. So maybe that’s where you are tripping up. But words carry meaning and intend to convey something, and so lust which carries a meaning is something that is bad.
We should never lust, not even after our wife.