Redirect help needed

How should I do this?

[Soze]

I would like to ad a link to a subdomain, but I don't want visitors of the site which the link is on, to be able to get to the subdomain from that link.

I want google to index the subdomain and follow the link through from my main domain, but I want it so that if people at my site clicked the link, it would go elsewhere.

The subdomain has adult content on it, but I don't want normal viewers of the site to be able to get to it for obvious reasons.

What would be the best method to do this?

[tedster]

There's no safe way to do this. Anything you try will be problematic with Google (and other search engines). What their spiders see should be the same as what a human visitor sees.