Context
Reddit is purging NSFW subs as well as trans-related subreddits
And a screenshot of the post on Reddit, from which the meme is quoting:
Brace for Rexxit 2.0. This is not drill! Granted, most of the Redfugees will be going to Lemmynsfw (I helped by dropping a link in, we'll see if that lasts) but as long as we get them out... I suppose you could call it missionary position work.
If it exists, there is porn of it. If there isn't, there will be.
That second half is rule 35 actually
Good to know. Thanks