How do I explain what 'sexy' means to a 6 year old?

[BlueberryPancake]

DS (6) came back from school the other day saying that some of the girls were singing a song which had the word sexy in it, and he wanted to know what it meant. I told him it was adult talk and children shouldn't be using this word. Then he started to call his little brother 'sexy', and then he started singing 'I'm sexy and I know it' which he probably heard on the radio, or at school. Then this turned out into a bit of a joke with his little brother and turned into 'if you're sexy and you know it clap your hands' !!! Anyway, how do I explain to him what it means and why it's not appropriate for a child to use that word? It's quite fully really, we've had many open discussions about sexual stuff and how babies are made etc, but I just can't get my head around how to explain what that word means...

[BlueberryPancake]

I meant funny, especially the 'if you're sexy and you know it clap your hands' bit...

[Fizzybee]

I told ds (6) it's a grown up word that adults use to mean they like how another grown up looks but stressed it was only appropriate for adults to say it he accepted that

[CogitoErgoSometimes]

Tell him calling someone 'sexy' means you really want to kiss them .... for most six year-old boys, kissing someone is a pretty alarming thought. Especially kid brothers.

[nellyjelly]

i had same conversation with my DD age 6. I blame that LMFAO song - ' I'm sexy and I Know it'

[BlueberryPancake]

Cogito, great idea! and yes i think it's from that stupid song too....

[CogitoErgoSometimes]

Wait until they look at you with their trusting little eyes and say 'darling mamma.... what does 'gay' mean?....' Cold light of day I could think of a thousand good answers. Put on the spot - rubbish.

[gobbledegook1]

My DSD is a bit older than that (10) and we just said its another way of saying someone is attractive though I think Fizzybee's way of saying it is probably better.

[Buntingbunny]

DD2 has never asked, I fear like the word fashionable, she's known from birth.