I did not mean sexsex.com better than just sex.com because it has sex twice in it . I meant if sexsex.com any better than 123sex.com because it DOES NOT have an unrelated keyword in it?
I think that a URL with a double word on it looks spammy and people will not click on it, I rather have 123sex instead. I am not sure about search engine ranking but I doubt it would make a big difference because all of the domains have the keyword "sex" written on them.