Not all web hosts allow adult related content (even nudity) on their servers, so you have to make sure that you pick the one that is okay with that, because you do not want to get your site suspended.
I can only recommend the ones that I use. TDMHosting is a solid company with a great reputation and they have shared WordPress plans for very nice prices and they will not kick you out for porn (as long as it is legal). In fact, I host several sites with them and I am quite pleased how things go with them.
I used to praise 247-Host on here but their customer service deteriorated and I no longer use them because of that.
I am testing other providers as well, but it is too soon to tell whether they are really good or not, so I will not mention them yet.