Would you rather sit on a cold toilet seat or a warm toilet seat?

Bathroom Preferences

sit on a cold toilet seat

In a public restroom, warmth almost certainly means someone just vacated the seat — a cold seat signals recent vacancy.
The psychological discomfort of inheriting a stranger's body heat is real and immediate, regardless of hygiene assurances.
Cold is briefly unpleasant but carries no hygiene implications; warmth raises uncomfortable questions about what came before.

sit on a warm toilet seat

Someone has sat on the seat either way — at least warmth provides physical comfort for the moment you're actually using it.
Intentionally heated toilet seats are common in many countries and represent a deliberate comfort feature, not a red flag.
Brief cold porcelain is a real, immediate physical shock; the discomfort from a warm seat is purely psychological and optional.
The contact risk is identical regardless of temperature; choosing warmth is simply choosing comfort over unfounded anxiety.