There are a number of Pixiv tags that express the content in terms of what the viewer would like to do about it. A simple and fairly clean example is 指を突っ込みたいへそ = “belly-button I want to stick my finger into”. This of course brings to mind the old joke that ends:
“That’s not my belly-button!”
“That ain’t my finger, either!”
Markdown formatting and simple HTML accepted.
Sometimes you have to double-click to enter text in the form (interaction between Isso and Bootstrap?). Tab is more reliable.