I see this sh1t test idea as an explanation tool more than anything, not a real thing. Every single thing that happens in your life you can react to in many different ways, a **** test is just one of those things, maybe women do it deliberately or not doesn't matter, if you're just trying to correctly reply to sh1t tests then you may get her into bed, but in the end your true colours will be revealed. So I would say improve your true colours and rather than always being on guard, always try to be your best self and do things right, whatever the situation
ps It's stupid when people whit no special insight give advice like I'm doing now but this sh1t test idea irritates me