I’m straight but get turned on by girl on girl videos?

I’m a completely heterosexual woman, been with my guy for 8 years, love him to death and he’s my other half, ive always only been attracted to men, live a very what you would consider “normal” life as a straight girl...buuut when it comes to watching dirty videos I get way more turned on watching girl on girl. My so loves that about me but I just feel so strange.

I’m not against homosexuals or anything, I’ve just always been confused as to why I’m only attracted to men in every day life...would never come close to wanting to be with a woman like “that”...but I only want to watch girl on girl videos compared to guy and girl?