Why do they always come in pairs

I’ll be on my phone, or working in my office, and I’ll see a solo bug fly by me and think “ok, just a solo bug” then BAM there’s another bug comes by. It’s always pairs. Always. <br><br>I feel like they just can’t go anywhere by themselves, always need to go together. <br><br>Otherwise it’s been a pretty mild year for bugs at my hour. Just wondering how’s everyone else in the region fairing this year.