Who does this? Well, a lot of Christians do.
For all this talk about purity, the gray areas are not discussed.
When couples in Christian culture get engaged they are encouraged to keep their engagement short. The engagement period is considered a ticking time bomb because of the difficulty of “staying pure.”
The ring is ideally given to a girl by her dad, but if he isn’t on the scene or is otherwise apathetic then she might get one herself or ask her mom for one, either because she really does want to make this commitment or possibly because the Jonas Brothers wear them. (Bristol Palin had one too.)
This is the complete inverse of waiting to kiss until your wedding day. Since you’re not technically doing it, you can still technically remain pure.
Who does this? Well, a lot of Christians do. If you google it you’ll find blogs and message boards filled with accounts of people who are waiting for their wedding day to kiss someone, anyone, for the first time.