Here's a clicky to Stewmac.com's page for their tung oil. You don't need a lot on the fretboard and I'm told it shouldn't be used more than a couple times a year. It just keeps the wood from drying out and helps to preserve it. I don't think it would be a good idea to use this product for intimate encounters as I'm pretty sure they're talking about putting it on plain old every day wood...;~)
*blue clicky tung oil thing*