If a coworker said this to you, how would you feel, how would you fee about his gf?

Today my male coworker came up to me with a box. I know he is a joker and I am sure he meant it as just a joke but he said to me hey this is for you and handed me my uniform pants and he said as you can see I didn't open it up so you can't say I have tried to get into your pants. I am not married and am much younger than him and know he has a gf of 3 years and I felt conflicted. Part of me knew it was a joke but part of me has heard him joke around before saying things in sexual nature to women joking. Thinks like secreatary was carring a box down the hall and he said hey didn't know you had such a big box. Then same girl was commenting on how this dress is unraveling at the hem and it is new and cost alot and he said well that is because I have been pulling at it with my teeth in my mind all day.

I guess I just wonder how his gf would feel about his "jokes" with the women at work. The other day they found a kid that was able to get on porn at the hosptial in the ER and he said gosh I wish I knew how he did that implying so he could jump on to watch it. I find his jokes kinda offensive for me but I also wonder how much respect he has for his gf saying things like that knowing he is in a relationship with her.

What do you think?