Emphasize that it is up to them to stick to their limits and tell them to be aware of how far things are going once their hormones are enjoying a make out session.
Work with them to create a list of rules together because they will be more likely to follow rules they help create!
There is a wide range of “normal” when it comes to human sexuality and your teen needs to know what the range is so they form happy, healthy relationships.
They need to know that family love is unconditional while romantic love is passionate and sexual and that, in long-term relationships, love becomes a combination of the two.
At its core, sexuality is something that is private, and constantly getting messages about what “should” be important makes it confusing to try to figure out what truly matters to your teen in a relationship.