A cum stain left on a couch or clothing which has been there for weeks
"Phil don't sit there" phil-"why" jack-"there is a 'rusty wank stain' there"
When you are wanking to a porn but you slate of the porn at the same time.
Have you see this cheap porno? I am totally going to masturslate it.
Seeing porn or hentai on a facebook which is pandering for likes!
"What's this post? Hentai, that's total wank bait!"