Men, how your girlfriend behaves when she is with you is not how she behaves when she is with her friends; and what she says while she is next to you is not really what she says when she is with her friends.
Here is a list of 4 funny things your girlfriend might be telling her friends about you;
1. What you are in the bedroom
Yeah. She might be probably letting her friends know how you perform in the bedroom; whether you are a 'monster' or just a 'piece of log'.
She might be bragging to her friends how dangerous you are. It's a nature of women to share some of their personal experiences with their friends.
2. She compares you with her ex
You are way much better than her ex or you still play low than her ex; she will tell her friends about this.
If she loves you more than she loved her ex then her friends will have to know about this.
3. All good things you've done for her
Yesterday you surprised her with a cute necklace or watch. Who is she not to tell her friends how happy she feels to have a man like you.
Again, she has to make her friends a little jealous with her relationship with you.
4. Marriage
This is a discussion especially among mature girls. Rather than talk about petty things, they talk about important aspects of life like marriage.
She will go out to her friends and explain to them whether she sees you as a potential husband or you are totally out of this.
Note: Not all girls expose their relationship matters; but most girls do these.