"Mum, there’s a naked man in the sauna.”
My 14-year-old daughter Dani lets out an anguished shriek as she dashes over, her face a mask of horror.
I can’t help laughing at her mortified expression and gently explain that our fellow German passengers don’t have the same inhibitions as we Brits when it comes to stripping off in public.
But it’s one of a number of cultural differences that come to the fore during our week-long family cruise along the Seine with German line A-Rosa.
We’ve been tempted aboard by the line’s family-friendly offer of free child places for under-15s along with benefits of the Premium Package that include free drinks and, thanks to a tie-up with Cosmos, complimentary home/airport transfers.
And while we may be sailing through northern France, the ambience on A-Rosa Viva is definitely Teutonic, led in part by A-Rosa’s Rostock roots and mainly German-speaking clientele, diluted marginally by a handful of Brits and a few Spaniards.
It makes for a novel combination and is quite unlike the mainly American feel of most other river cruise lines. Even the decor is markedly different: bright and breezy with vivid reds and oranges, giving the ship a warm, summery glow.
Everything seems to run with Germanic efficiency, although the buffet-style dining injects flexibility at mealtimes as we can eat when and where we like.
Admittedly, the absence of waiter service here risks making dinners less of an occasion, but our trip coincides with a summer heatwave, so we eat alfresco at every opportunity.
Spending balmy evenings dining on deck is blissful, and the same goes for breakfast and lunch. In fact, this becomes one of the most enjoyable and memorable parts of the cruise.
The cuisine is tasty and refreshingly different, reflecting healthier continental tastes rather than ubiquitous burgers, pizza and chips.
In addition to a surfeit of fish dishes, including perch and pike, there are braised pork cheeks, calamari and chicken dishes, plus a good selection of salads. In fact, there’s no shortage of culinary temptations.
Desserts are less varied, with ice creams and mousses most common, much to the delight of Dani and her twin sister Holly – along with crepes and cheeses from all corners of France.
A more formal alternative is the speciality 32-seat French brasserie, where we enjoy a five-course feast with accompanying wines, costing €42. But as we’re on the Premium Package, not only are most drinks included during our cruise, but this grand dinner costs just €14.50 extra.