Church Cleavage
A tasteful amount of cleavage for special times, like when you're in church or having dinner with family. No one wants to see a massive erection on the Priest or Uncle Bob.
Your girlfriend Amanda has a great rack, are you nervous about her meeting your family and your little brother staring at her boobs the whole time. Nah, it's cool, she's keeping it PG and showing only church cleavage.