Oh dear - have I done the wrong thing?

My work colleague has a tendency to talk about men's private parts. I do find it embarring, but I laugh it off (so I don't look a prude). The latest case being she said to me, "Maybe you make your boss's thing hard". I don't dress in a way that this could possbily happen. Anyway I went to ask another colleague if she also gets this kind of talk from her (about men's privates) and she said, "I think it's because she wants to act like one of the girls". I told her what she had said about my boss and she grinned. This colleague is a gossip and I don't know if what I told her was wise. I'm worried that it'd get back, but then no one told me to keep anything secret. I hope you all get m y drift. What do you think. Did I do something wrong? I feel I had to talk to someone about it, as I don't want her sensual conversations to border on ual harrment.