The internet being what it is, I think it's better that you not access this stuff. If the powers that be find out that you're 16 and accessing a website that carries material that in some cases must be classified as R18, they'll probably look to close down the website.
Tickling isn't necessarily R18, but there are a lot of pics and clips on here that show breasts, genetalia, hardcore bondage and the like. There's also the solicitation for tickling and sex that may or may not go on in the personal section.
Makes it a bit difficult to justify having 15, 16 and 17 year olds registered and posting on here (which there probably are - it's very easy to lie about one's age!).