Fish
Yea confidence is the key..i fish with a lot of guys and have set beside them and using same line, lure and have out fished them many times..they say something about "luckY" underwear, but i say its experience and time on the water. Same goes for wadin clear water streams, same results..knowing the water and the specie your after plays a big part in catching and having confidence in what you are doing, using ect. is the key also.
I get caught up in tackle because im a tackleholic, but thats just me...i prefer lines, reels and rods most guys dont use as i like to be different and it fits my style of fishing compared to the norm.
Skunked??? no way, if your partner keeps skunking you, then find out why..is he using a different lure than you(if so buy some of them to) if its the same lure..then is he retrieving it differently than you? is he fishing only certain spots(ie fast water, you slow water or vis versa? I do SOMETIMES get beat while fishing with someone, but thats usualy because some of them learn what im doing and beat me to key spots that ive been catching fish in, or i let them get to those areas first to get them fish(if i out fished them all the time, they wouldnt want to fish with me anymore,,lol

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I would say getting skunked by a partner is not because of line color, unless your using some God awful BRIGHT colored stuff
Scott