Phoebe Deklerk's Cumming of Age, at the Sewing Room, is a musical comedy paean to the joys of masturbation (literal masturbation, rather than in the sense one often hears it applied to artistic works). She waxes rhapsodic about it in a mixture of confessional, comedy and cabaret, recounting her personal history as a do-it-yourself enthusiast without embarrassment – and, even more amazingly, without causing the mixed audience any apparent embarrassment.

Her approach to the subject matter is amusing, light-hearted and sex-positive, yet remarkably decorous: she says that she no longer does phone sex work even for a select clientele and close friends, she remains fully dressed throughout the show, and there are no demonstrations or even diagrams (if that's what you were hoping for, bad luck, but isn't that what the internet is for?).

As well as being an entertaining speaker, she sings in multiple languages, performing La Vie en Rose, show tunes from Grease and Phantom of the Opera, snatches of Italian opera, and some songs about her recreational activities that I strongly suspect are her own compositions.

Obviously this show isn't going to delight everyone, whether or not they have the appropriate plumbing, and some readers will be deterred simply by the subject matter and the premise that it might be a good thing if we all took responsibility for our own orgasms sometimes - or that, in this age of Tinder and similar apps, masturbation might be a better approach than the one-night stands which provide so much material for so many other stand-up comedy shows.

I suspect that the talented Ms Deklerk will spend most of this unusual show's run speaking to the converted (or perverted, if you prefer) who will doubtless enjoy it immensely – which strikes me as something of a pity, because the show is not only illuminating, it's so utterly engaging it deserves to be seen by as many people as possible.