Why do women frighten so easy?

Sometimes I feel like its an act. Like women pretend to be frighten or scared when they really aren't, for attention. I work at a fast pace job, building bicycle's, and I do swear alot, because I run the bike shop and I am responsible for getting orders out on time and right. We got a few new girls working in the bike shop, and at times they really drag their butts, and make mistakes that slow everything down. I was very patient and supportive of them, when they started, but its been 8 weeks, and they are still as green as when they first started. So now I just swear and yell at them. However, one of them told my boss, that She is affriad of me, and i found out the girls call me angry bunny. Personly I am pretty pissed off, because my boss was gona fire them, but i told them they will get it down, and now i think they have gotten into his head. Or maybe i really do scare them, but I really tried to be nice, and it didn't do anything. So if they arn't going to respect my kindness, I will be the "angry bunny"