Why does he keep screenshotting my snapchats?

This one guy started screenshotting my snapchats a couple of days ago, and he only does it for snaps I show my face in and they're usually me doing something really stupid or telling a dumb ass story. I'd think it was for my amusing stupid stories, but he doesn't screenshot snaps when I'm telling a story and don't show my face. It can't be that he doesn't have enought time to read them because I have my snaps set to no time limit. The other day he asked me out to go midnight bowling with him, like a day after he started screenshotting my snaps. Why does he keep screenshotting my snaps?
Why does he keep screenshotting my snapchats?
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