Fashion designer Stella McCartney plays a '70s style sex ed instructor who appears in a video watched by the cast of Netflix's "Sex Education," in a new PSA created for the U.K.'s Breast Cancer Awareness Month.

In the film, which was created out of Acne, McCartney is seen presenting a 70s-style sex ed video, in which she claims that breast cancer can be caused by "deodorant, mobile phones, microwaves, nipple piercings and bras," surrounded by suggestively shaped fruit such as melons and coconuts.

The modern teenagers watching (including Sex Education stars Aimee Lou Wood, Chinenye Ezeudu, Sami Outalbali, Mimi Keene, Chaneil Kular and Simone Ashley) are pretty unimpressed, and then start their own conversation about self examination, stressing a bathroom routine that involves "toilet, teeth and tits." 

The effort aims to engage Gen Z viewers who are fans of the show but also to encourage people of all ages to check their breasts as part of their regular routine. The designer has also released a limited-edition "TTT" t-shirt in pale blue organic cotton.

“It’s my ultimate hope that young women will integrate these three simple steps into their morning routines and that we can save them and their families the horrendous impact of this disease," McCartney told Vogue.