Ringworld, Louid and Teela

I've heard this book is really good but I just can't seem to wrap my head around the 200 year old man and this 20 year old girl. Does it get less.. I dunno the words honestly. I want to get into this book but like, they seem very focused on the sexual dynamics between this relative child and space aliens and an old man. Am I being short sighted and should stick it out or is the book just about this old dude and this "lucky" lady?

I just came here for the aliens.