I'm male myself and I've never had a in real life friend of the same gender that plays Animal Crossing. I think the only guys that play this franchise has either:
1.
Picked it up due to a girlfriend/partner. Maybe a parent even? Siblings?
2.
My case: Because I enjoy games like The Sims, or Habbo Hotel, and Stardew Valley, etc etc and so on. I remember always hiding my gaming collection as a teen back in 2006 and 2009 because of Wild World and City Folk. Haha oh how vain we were as teenagers... Heck, even New Leaf was still something I was ashamed of when I just started my 20's and bought the 3DS for it. I'm sure other guys can confess to this feeling.
But now due to the quarantine and how well New Horizons sold, I wouldn't be surprised if the fan-base grew with male players too haha!