Adult warning for twitter Tumbler Flickr?

[Jason]

I see nude adult themed erotic photos in every site Twitter Tumblr Flickr. I have those accounts posted some of my own favorites others. Do I need to post a Warning on my profile information must be 18years old in order to view my profile if your not please leave my profile. If your offense leave my profile.
But is it required do I need to say something like that? Or can someone type something up ill copy and paste on my profile info?

Also seen pictures where it's a mini repeating 2-3 sec repeating clip but its photo of some man cumming on a woman. How do I do that?

[Midnightdinner891]

You need to set the FILTER of your content to indicate it is for adults only:
https://www.flickr.com/help/filters/#249

That HELP page from flickr tells you how to do that. If you don't, your content may be flagged and removed as inappropriate.