I personally would like a tag for when a girl is holding a penis and putting it in her. Like, right before it goes in, and it's touching the vagina.
Seen in the bottom right corner of this: http://danbooru.me/post/show/339276/blush-censored-dragon_quest-dragon_quest_viii-fell
I've run into a lot more posts, so it'd be great to have a tag.
Updated by sgcdonmai