Picasso the genius, the sensualist, the womaniser, the priapic beast. This much we think we know of the great Spanish artist. But how about Picasso the political activist? Picasso the supporter of women’s causes? Picasso the… feminist? Oh, yes, that Picasso. In a landmark Liverpool exhibition focusing on the years 1944 to his death in 1973, and bringing together 150 works from around the globe, Picasso becomes all of these things.

The war was over, Picasso was finally free to leave the privations of Paris behind him and to spend more time in the South of France, marking a return to his Mediterranean heritage. The Gagosian Gallery’s exhibition, curated by Picasso’s distinguished biographer John Richardson and the artist’s grandson Bernard Ruiz-Picasso, focuses on those Mediterranean years, between 1945 to 1962, when the artist was moving easily between styles.

Sincerity is not a quality the contemporary art world seems to value: the masking of emotions under layers of irony is where we stand. But while Damien Hirst paints from a cynical palette, British Pop Artist Stuart Semple's Nineties-inflected paintings have sincerity to spare.

Next week sees the opening of an exhibition at Marlborough Fine Art of new work by Maggi Hambling, one of the most innovative and prolific - not to mention flamboyant - artists working in Britain today, which neatly coincides with a show of sea paintings at the Fitzwilliam in Cambridge. You can see a selection in theartsdesk's gallery. Born in 1945, she has a reputation for being fierce and she’s certainly imposing – had she opted for a career in the performing arts she’d have given Edith Evan’s Lady Bracknell a run for her money – but she’s also extremely good company. And she’s a grafter, rising before dawn and putting the hours in before collapsing with a whisky in front of Coronation Street. “Well, one has to keep in touch with reality somehow,” she told me when I recently visited her at her studio in Suffolk.

I’ve seen raping Popes, I’ve seen more naked guys dancing with waggling penises than I can count, I’ve seen naked breasts on dancing girls for what feels like all my adult life. But a man with a blood-stained prosthetic cock that looks like a baby’s bottle? A teacher munching a testicle off his pupil? Well, lor' love a duck.

Arshile Gorky found it almost impossible to finish a painting. Something would always call him back. So he would go back and would add and retouch and tinker around over several years - sometimes over the course of a decade or two. “When something is finished,” he once said, “that means it’s dead, doesn’t it? I never finish a painting, I just stop working on it for a while. The thing to do is... never finish a painting.”