Plasma (oxytocin) levels increased during sexual arousal in both women and men and were significantly higher during orgasm/ejaculation than during prior baseline testing.
A different study found that results differed between men and women, concluding:
We conclude that in man (arginine vasopressin) is secreted during sexual arousal, and there is, subsequently, a selective release of (oxytocin) at the time of ejaculation.
This points to a different pysiological response to sexual intercourse between men and women.
It has also been suggested that this is why men 'want' sex immediately prior, but typically lose interest immediately after ejaculation, but why women tend ot want to cuddle and feel held/comforted.
According to one study:
Plasma (oxytocin) levels increased during sexual arousal in both women and men and were significantly higher during orgasm/ejaculation than during prior baseline testing.
http://www.ncbi.nlm.nih.gov/pubmed/3782434
A different study found that results differed between men and women, concluding:
We conclude that in man (arginine vasopressin) is secreted during sexual arousal, and there is, subsequently, a selective release of (oxytocin) at the time of ejaculation.
http://www.ncbi.nlm.nih.gov/pubmed/3654918
This points to a different pysiological response to sexual intercourse between men and women.
It has also been suggested that this is why men 'want' sex immediately prior, but typically lose interest immediately after ejaculation, but why women tend ot want to cuddle and feel held/comforted.