<human>: Give me the gist of the text in a nutshell

So basically, I work at a shop. I can be a bit too rough and clumsy with stuff, and have become a little infamous for breaking a couple of the little gun things we use to put tags on clothes. 

One day my manager said (to my coworkers when I was serving a customer, but again to me when I asked her why I had heard my name behind me) something to the effect of "if she's this rough with the guns, I feel sorry for any man she gives a HJ to". 

This made me feel really embarrassed (more so because it was in front of my co-workers, even though they didn't seem to side with either of us). I don't understand it when people think it's appropriate to say stuff about sex to someone they don't know too well. Like, she was basically imagining me doing a sexual act - to me that's really creepy and invasive. 

My question is not so much for practical advice as she has moved to a different department of the shop now so I don't see her, but more for opinions of who is in the right. Am I being too over-sensitive about a light-hearted joke, or is it acceptable to say that kind of stuff to someone? I should say that we don't have a precedent of this kind of joking, in fact she knows that I feel uncomfortable when she jokes about sex with co-workers.
<bot>: manager made a joke about my HJ-giving abilities, is this appropriate/normal or am I justified in feeling a bit violated/awkward?