I usually share the opinion that making sexual references to everything is silly, but in the case for the communities that are based on Reddit’s “SFW Network”, it seems appropriate.
If you think about it, all these communities are just sharing visually stimulating images and are intended to be consumed without significant context. This is pretty much the definition of porn.
If anything, I kind like the idea of having a name in the community that reminds you that of you shouldn’t be spending too much time on…