It’s a funny old thing, the Fringe. One minute you’re sweating bollocks and contemplating spending £5.50 on a can of beer, the next you’re sitting in a bunker finding out how to teach teenagers to masturbate. Context is, of course, everything: Josephine Lacey’s son is autistic and, as he reaches puberty, she finds herself in a support worker’s office perusing a range of resources to help him learn about masturbation.

There’s plenty of comedy to mine and Lacey’s delivery is always engaging. But when the social storyboards come out, things drift into a bit of a lecture before she gets back on track with her little box of tricks (balloons and lube: you’ll maybe want to skip the front row). Packed with obvious affection, parents of neuro-diverse young people, in particular, will feel seen, although we could all pick up a couple of tips about unconditional love from Lacey.

Josephine Lacey: Autism Mama, Pleasance Courtyard, until 25 August, 6pm; main picture: Jiksaw