An empathetic Guy who feels bad for girls on their period. Typically will talk to multiple girls for them to vent to him, or may even be asked to purchase woman hygiene products for girls on their period.
Sally: Dan is such a sweet guy. He was willing to go to the store and buy me pads when I couldn't leave work.
Victoria: Yeah, he's a real Period Guy
Ruby: Hey Tanner, can I vent about my day? I warn you, it is period talk
Tanner: Not a problem, I'm the Period Guy