If anyone else was interested in styles like I have, I know Lovehoney actually sell this.
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I don’t own this one but I use something similar.
I’m quite surprised LH don’t sell something like these stencils below, I know my martini triangle would be so much easier to maintain with one of these and I’m sure many others would love to try the heart shape 
https://lovehoneyforum.com/t/pander-to-me-products-only/257390/1310
I think I will definitely put this in the Pander to me! … PRODUCTS ONLY