It's funny that all these European countries associate titfucking with a different European country. The Brits call it a French Fuck, the French call it a Spanish Fuck, the Spanish call it a Russian Fuck, etc. It seems no nation wants to take credit for this glorious sex act.
One thing I would love to know is in which countries titfucking is most popular or most commonly practiced. My best guess would be the US, UK, Japan, & Russia, since these countries are known for their boob-obsessed cultures. But I've never seen any real data on this (surveys, porn consumption trends, etc).