Summary: http://www.ibtimes.co.uk/being-long-term-relationship-kills-sex-drive-women-1592608

Original study: https://www.ncbi.nlm.nih.gov/pubmed/27766993

Some nuggets carved out for you all.

"Sexual satisfaction in particular varied greatly in seven years, but the ability to have an orgasm remained stable for most women – suggesting that sexual satisfaction and orgasm are not always linked."
If you're ever wondering how to please your woman, just remember this. Sexual satisfaction for a woman comes from feeling desired, not from orgasm.

"Women who stayed in the same monogamous relationship from the beginning to the end of the study reported the greatest decrease in their sex drive. Women who had started a new relationship during the course of the study also experienced reduced libido, but to a smaller degree."
If you're wondering why we warn you against LTRs, here's part of it.

"Finally, women who were single at the end of the observation period reported stable sexual desire."
There you have it. Just keep spinning, lads, and never look back.