If your blog posts are relatively short and contain only a one picture or video, then you can display full posts on your adult site but I am almost always using excerpts for many reasons and I am getting better results than if I would show full posts.
If you use excerpts, you are going to improve the page load time for your website, increase pageviews and reduce bounce rate.
Keep in mind that if you display full posts on your site, so people can see a picture, watch a video or read some post without having to click through to the posts, it counts as a bounce. So it is a big no no for SEO.