There are lots of (portfolio) websites available for the enthousiast / pro photographers. Some are free, and some cost a couple of dollars/euros a year. The most popular are (in no particular order, but since I store my photos @ SmugMug....);
In general, Flickr is portrayed as a photobucket where people dump their photos and comment on others with the weirdest badges, just to get some attention.This was also the reason I stopped paying for my Flickr account.
Both SmugMug and 500px offer less 'noisy' features and lots of customization options, but the thing they all have in common; they offer an app (at least one) the give the users an excellent experience on their mobile devices (Android and iOS).
Also, each of these services allow (up to some degree) nude photos, and as long as it's artistic you shouldn't have a problem publishing your photos on these platforms. Especially when you mark them as nude/possibly offensive, etc.
This week, Apple pulled the 500px app from the Apple App Store, because it was too easy to find nude photos [1, 2], and this violates their terms of service. The funny thing is that most of these apps allow the user to find nude content, and Apple's mobile browser (Safari) being one of the worst.
Just today a got a new follower on Twitter with a username that didn't leave much to the imagination. I just followed the users website link (which opened in Safari) and 'stumbled' upon a Tumblr account with tons of nude photos. All it took was 1 click.
Talking about Tumblr.... They have their own app where you can 'subscribe' to these micro-blogs. So I guess that Apple needs to revise their App Store terms, because this is ridiculous.