lesbian relationship question 👀

Lateisha
So my girlfriend and I have been together over a year. Just a little background on us... she considers herself a stud and I personally don't know what I consider myself lol because I have an 20yr old and a 5 yr old and she's my first serious realationship with a girl. I've been with other females but never in a open out right relationship until now. While I can appreciate an attractive woman I don't "check" for other women/studs only her! It's kind of hard to explain but I love/attracted to her not women if that makes any sense lol. Anyways to my question. We had a discussion amongst ourselves and then took this same discussion to our friends and now I want to hear you guys opionion. So my question is why do most studs if in a realationship with fem girl feel like its automatic that the fem girl takes the studs last name. 🤔 And why or why don't you agree with this?👀👀👀