Mohs scale of erotic hardness

Can also be separated into relationships and content.

1 – handshakes, fistbumps, and hi fives

2 – holding hands, hugging, and light cheek kissing

3 – repeated kissing, or a short kiss on the mouth.

4 – In relationships: making out; Visuals: partial or impartial nudity, or softcore pornography; Either way: touching privates

5 – full frontal nudity, sexual intercourse, or hardcore pornography.

Up to 3 would be allowed for G or PG. 4 would qualify for no less than PG-13, and may be higher depending on the erotic content that makes it 4. 5 would be R or better yet, NC-17. In TV-guide, 5 would definitely be no less than TV-MA.

If you have any suggestions for numbers between the ones I have, suggest it in the comment.

Might be subject to edits