<human>: I'm male.

This is my first girlfriend and I don't understand all the social etique yet. I have been a very isolated person. Does it make me look insecure or domineering if I put my arm around her when she is talking to another guy? My girlfriend is always happy and just easily makes friends and conversation with random people so this happens a lot. Early in our relationship she made it pretty clear that she likes a man to be a man, defend her, speak up all that stuff. So I have a reason to believe she wants me to stand up and claim her publicly. But, I don't want to be the jealous boyfriend either. How should I handle these situations? Thank you.

Can you provide a brief overview of the text?
<bot>: Should I put my arm around my girlfriend to communicate that she is taken. Or otherwise make it more obvious we are together and if so how? Thanks.