Spearheading a trend reflected across many of the collections unveiled in Italy's home of fashion was Gucci.
The Florence-based house has been taken in a radical new direction by Alessandro Michele, the former handbag designer who took over as creative director following the sacking of Frida Giannini at the end of last year.
To a soundtrack of Gregorian chanting, Michele sent out a stream of models in pastel-coloured silk blouses and lace shirts that would not have looked out of place at a 1970s music festival.
Floral-patterned suits, low-waisted, ground-scraping flares, geeky big glasses, handbags, embroidered dressing gowns, 70s-cut trenchcoats and tie-dye denim shorts also featured in a collection presented in a former customs warehouse.
It was a collection Michele pointedly depicted as a break with the brand's reputation for playing it safe.
"Détournement is the opposite of quotation," said the typically cryptic press notes, borrowing a phrase from theorist Guy Debord and the French word for a diversion.
It was certainly that: traditional male dressing codes have been diverted to the point that they are borrowing women's clothes, fabrics and favourite accessories.
Only time will tell if Gucci's gamble on a younger, more daring vision of one of the world's most valuable luxury brands will pay off.
But the initial reaction in the specialist fashion press and in the increasingly important blogosphere to Monday's show appears to have been quite positive.
"The press has been gentle on the unassuming Michele, embracing his daring neo-dandyism and recognizing his influence," Women's Wear Daily noted, before adding the killer question: "But what will customers say?"
Italian label Etro also borrowed from a range of colours - electric blue, golden yellow and dirty pink among them - that traditionally have been the preserve of womenswear for a collection that designer Keane Etro said had been inspired by the egg, "the symbol of male and female union."
At venerable Italian house, Canali tradition was updated rather than thrown out under designer Andrea Pompilio's vision of "a never-ending Mediterranean summer" in a collection that relied heavily on featherweight fabrics including organza, Egyptian cotton and a linen-silk-wool mix, and featured models carrying vintage mini-suitcases as handbags.
The trend towards a de facto merger of men and women's clothing was underlined at the weekend by a Prada collection in which soft silk shirts worn open to the belly button or lower and partially tucked-in featured repeatedly.
As if to drive home the point, designer Miuccia Prada also used her menswear show as an opportunity to show off a string of items from her womenswear collection.
In the words of Stefano Pilati, head of design at Ermenegildo Zegna, the key to the feminised look is restrained application. Today's fashion conscious man is "romantic but sure of himself, strong and with an almost feminine attitude," he says with a marked emphasis on the "almost".
Giorgio Armani and Ermanno Scervino were among the designers showing collections on Tuesday, the final day of the menswear shows.