If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.

Girl: I have a boyfriend Boy: I have a math test Girl: What? Why don't you take my Whatchamacallit and slip it up your Bit 'O' Honey? Your daddy must be a drug dealer, cuz you're so dope. I advise you to surrender immediately, or I'll have to use a chat up line.