Buy Sarah a present to show that you are okay with it.

"Last night, my girlfriend told me that she was into..." You wave your hand around the room to indicate everything in the store. "This."

"And you want to understand it better?" She asks. "That's very sweet."

"Actually, I read a lot about it online. That's how I found this place." You explain. "It's just that I didn't say much when she told me and I'm sure she's worried about my reaction. I thought maybe if I bought her a present here it would show that I accept this part of her."

"Well a baby always need more diapers." She says with a smile as she leads you to the back of the shop. "Maybe you could get her cloth diapers. They are a lot thicker than disposables and a lot of people like that feeling.

You look at the options. There are big squares of thick terrycloth that need to be folded and then fastened with safety pins, along with plastic panties to go over them. There are also various others which are already shaped like a diaper and have the plastic cover built in.

"Or you could look through the clothes." She indicates the racks. "Find something that will look cute on her."