25c is literally cock and ball torture what are ya on about. Then again I'm an Irish guy who hasn't left my country in nearly a decade so I don't even know what more than 25c feels like
I'm Brazilian and, although I'm not in the hottest area, summer easily hits 40°C, so yeah, 25°C is not perfect, that would be 20°C, but is pretty good still
Tbh, in summer I sleep with the airco on 27c. Where I live summer gets a nice and toasty 30c+ 24/7 @ 80%+ humidity. 25c feels amazing compared to that.
Before I moved here, I'd also have said 20c was ideal though :)