Ringworld is so unnecessarily sexual

I have, for the most part, been enjoying the book but as it goes on it really feels like the story has become a vehicle for Louis to have increasing sexual encounters. They dumped his previous girlfriend (with an 180 year age gap) and he immediately got a new hot alien babe who tried to control him but due to circumstances is now under his spell and can't get enough of his sexual powers.

I don't think he's a particularly good writer, the ideas are interesting and cool but I don't really get a proper picture of the worlds in my head, and the sex scenes have become so gratuitous and unnecessary I'm fed up of the whole thing.

The bit where they encountered his new sex partner was so dismissive of women, on their spaceship there was a crew of 36 and 3 were women, and it's heavily implied that they were all prostitutes and the men did everything else.

I'm 90% of the way through and I'm going to finish it, but I can't see myself picking up any of the sequels. Does anyone think that's a mistake? Am I missing out, or is it just an excuse for him to write several more books one-handed?

I didn't really know anything about it before picking it up other than it was old sci-fi but the trash level has really put me off.