Sounds like someone's not getting her big O oxytocin release.
Lots of cart/horse in that article. The relationship isn't made more successful because the guy cuddles. It works because he isn't there solely for sex and can still stand her when the sex is done. The post-sex cuddle is the result of his affection, not the cause. Some women I felt like spooning, others not so much. It's no great revelation that those for whom I lacked genuine affection were poor candidates for a long term relationship.
Psych studies in general that present their 'findings' as being as conclusive as physical science kinda give me the shits.