Questions about brown without sun

Hi fine ni!

If any day I thought I would write a detailed post about tan without sun here in the blog (will get one in the webshop soon !!), and thought to ask you if you have any specific questions about it before?

If you have it, just ask, and I will answer it in my post later :) ♥

(I always get a streak on my stomach when I sit down, it is not due to brown but the sun)