This is an interesting, but narrowly focused, paper based primarily on rat studies. In essence, it examines the power of orgasm to reinforce preferences (for associated stimuli/places), and the neuroendocrine mechanisms involved.
Most of it is not about pair bonding species of rodents, and I think the authors are being a bit over-reaching in their assumptions when they suggest that sexual reward (alone) is the glue in pair-bonding species. Mind you, mating-frenzy is likely to play a role in initial bonding in pair bonders, of course, but it may be that attachment cues (bonding behaviors) are more important over the long haul. I'm always reminded of the statement of David Barrash, who pointed out that in pair-bonding species, most interactions (after the mating frenzy phase) are far tamer, such as mutual grooming and huddling.
Interestingly, an editor of the issue in which this paper was published points out that, even in rats (a promiscuous species):
a male rat only forms a preference for a female mate if he stays near her in the post-ejaculatory interval.
"Premature ejaculation" (ejaculation without sufficient pre-O jollies) also prevents preference in a male.
They also review findings demonstrating that disruption to preference-formation occurs when male rat ejaculation occurs with insufficient levels of arousal during copulation. Future work should investigate the degree to which these kinds of dynamics are present in humans and seek to understand how they differ between species and among individuals.
But is it "levels of arousal" or "repeated bouts of intromission?" (Rats typically chase each other around with multiple bouts of intromission during mating before climax.) From the paper:
Although the PEI [post-ejaculatory interval] is the main component that facilitates the development or shaping of partner preference, evidence indicates that what happens before ejaculation (pre-orgasm) may be also important for the whole experience of sexual reward and perhaps for the shaping of partner preferences. For example, rats that ejaculate too fast (i.e. treated with the serotonin 1A receptor agonist 8-OH-DPAT) or with no preceding intromissions are said to have a facilitated (rapid) ejaculation but not a facilitated sexual motivation or desire. Those rats fail to show ejaculation-induced CPP (Camacho, Castro, Hernandez, & Paredes, 2007), suggesting that an ejaculation that comes too quickly without increasing levels of arousal during copulation is either not experienced as rewarding or may not be processed as a salient-enough UCS.
Anyway, here's the paper in full: The role of orgasm in the development and shaping of partner preferences