Boyfriend saw my bum?

My boyfriend was over at my house and we were just sitting on the couch watching tv. I dropped the remote so I had to bend over and get it. He told me my crack was showing and I was mortified. We've only been going out for a couple of weeks and i'm not comfortable enough yet for him to see my body. I'm so embarrassed. Guys, would it be a big deal if you saw your girlfriend's crack?
Boyfriend saw my bum?
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