What does it mean? Advice please

I guess this is a confession I don't know. Anyway I'm a 29 yr old female and I love my boyfriend, were actually discussing marriage right now but whenever I'm out and about maybe bar hopping or whatever I find myself looking at girls and when I go home and finger myself think about them. I've done this for a long time. Or sometimes I'll make up a whole porno scene in my mind of how a girl ties me up and has her way with me or it can be 2 random girls and a guy together. What does that mean? I know I have a very active imagination but I just wonder if that is normal to do that. I don't have anything against being curious or gay, but when I have those thoughts what does it mean? I don't want to say anything to my guy or friends about it because it's personal so I thought I would ask you all.

Dont worry about it. They are just fantasies that are in your mind and make you feel good. Doesn't mean you're gay or anything. Fantasies are a good thing. Take care and enjoy them xxx