Does it matter? No. Will I tell? Yes.
I have no problem with swear words, unless you are using them to hurt other people. Maybe it's because they are a normal part of life from me. Either I've heard people my age, my parents and their friends, and random strangers use them so much that they don't bother me. Now, I have a few friends who looks aghast every time someone swears.
For some people, it's a religious thing, but I'm not religious.
People looked shocked any time I swear, but It's just a natural part of my language, even when I was really little. If I drop something heavy on my foot, or am running late for class, suddenly I swear every few words. It's a habit. And I'm okay with that.