I knew a pair of (famous) twins in the 1990s, born, of course, minutes apart on the same date. One was a pleasant, laid back sort-of amusing individual, and other was arrogant, rude, unpleasant aggressive, and downright nasty. Same star sign. The half-wits who think that the location of stars, some of them huge distances apart, can influence the character of humans have never come up with an explanation for this sort of conundrum that even meets the basic requirement of being internally consistent.
The other one that tickled me was some guy in the USA working for a provincial paper, who was put in charge of writing the horoscopes. For years, he just cut out the horoscopes from other papers and magazines (without their headline star-sign, mixed them up at random, and published them in his paper. He was inundated with people telling him how wonderful his predictions were. Even when he moved on and publically revealed what he had been doing, the populace said he had such talent that he wasn't drawing the stuff at random...........his hand was being guided by celestial knowledge beyond his control.
When I was young and single, if the girl I was chatting up asked what my star sign was I would politely thank her for her time and tell her we just aren't going to be getting on. Yep, I passed up the opportunity for sex because the half-wittedness of believing in horoscopes is just so far beyond stupid........