I totally misunderstood this question. I was like, well, duh, I have instruments. I have to tune my guitar etc. Then it just hit me that you meant during sex. I should have read the OP better haha.
Now, to answer the question, no I have not, because I don't have any body piercings yet. I'll keep that in mind once I do get some. I have a few lying around this place somewhere. Come to think of it, I think I have only 1 actual tuning fork now and 2 electronic tuners...Aww. I have no clue where the old school tuning fork is now.