The 百合 tag at Pixiv starts at “two girls in picture”, passes through “friendship” and “obvious attraction” on the way to “making out”, and ends up at “hardcore lesbian pr0n”. That last one is generally not canon for the characters depicted, even the ones also tagged 百合夫婦, “yuri married couple”.
Markdown formatting and simple HTML accepted.
Sometimes you have to double-click to enter text in the form (interaction between Isso and Bootstrap?). Tab is more reliable.