Crab
Cancers approach flirting with sensitivity and carelessness, that is, they think that no one will offend them, just as they will not offend anyone. Furthermore, they believe that if they are completely honest and "open" their hearts they will get the response they deserve. They try to exploit their weaknesses to be liked, but end up winning the other's sympathy rather than the love interest.
Virgo
They actually don't even know what flirting is. If they try in their life to try it, they will plan it hours in advance (in every detail), but in the end they will achieve nothing, because they actually expect the whole stage to unfold perfectly, as in their mind . They only act according to a plan (of theirs) and if something doesn't go as they expect, they give up.
Aquarius
It's a little hard to believe that the witty and intelligent Aquarius has a hard time flirting, but it's true. In fact, he is not that interested in flirting. In fact, he will start this "game" very rarely, while the way he will approach the person he cares about seems a bit irritating, as he constantly tries to tickle them and bring them to their limits.