there is no specific information indicating that there are two toilets in Spain as a standard practice. It's possible that you may have come across some misunderstanding or misconception.
In general, bathrooms in Spain, like in many other countries, typically have a single toilet. The design and layout of bathrooms may vary based on the type of establishment, whether it's a private residence, a restaurant, a hotel, or a public facility.
If you have any specific information or context about why you believe there are two toilets in Spain, please share it, and I'll do my best to address it accordingly.