As an aside, it might be a good idea to check privacy settings for Snapchat (I know, I know.. if you're already using it, you're blown) unless you want to be humblebragging.
Last year, I noticed women I had gone on dates with were coming up as suggested people to follow on Instagram. IG claimed it was because of photos I liked, but I knew that wasn't the case and assumed it connected us through our numbers and the other women did not turn off their discoverability (I had turned off mine). Call me old fashioned, but Instagrams and Tweeters are things I don't share until the 3 or 4th date.