Is this a good reason for my mom to think my friend is a slut?

As a mom myself, and just got out of my teen years myself, I see your mom's point. It is kinda freaky your mom "stalks" your friend's page, but if your friend is a virgin, why would she be liking links like that? Maybe she is doing this to show off to other people? I mean, with hairless boys, really isnt something I think a virgin would like, or an innocent girl either. Other than that, I understand your point wanting to hang out with her because she is your friend. As of how you can convince your mom, I would just tell her that she postd those things to show off, and explain to her that shes a virgin and doesnt mess with guys. Good luck and take care!