Time to have F word discussion?

So my son learnt the workd 4 years back or so unfortunately when he was surrounded by some pre-teens kids in party but my son was 6 and i could brush it off when he asked more....

Then past couple of years that has come up again as more kids in school mentioning the word...

I could get away saying...

"it means nothing but people use it to curse it so it is bad n we should not use it, u know ur parents don't"

and that worked....

But now his curiosity has increased...

(I am glad he openly talks to me about how kids use word 'sexy' and how they trick u in saying the F word...so i do not scold, i listen and ask him to restrain himself for not using bad words himself just like hell or sucks. )

so one nice day he told me..."mom i feel like...i want to look the F word in dictionary....i want to do so much...but then there is something inside which tells me i should not do so as it won;t be good for me"

and i was like o, o! so far it never occured to him to look it up...now he wants to refrain though he feels like but in no time he would look it up.

What should i do? What should be my next steps?

(he will be 10 in no time)

Time to have F word discussion?