Ha, homersimpson085,

It's not just endorphins that kick in after a great sexual experience - it's also oxytocin [a nanopeptide] which triggers pleasurable feelings in both men and women. You get your oxytocin going by getting touched, fondled, squeezed - by someone you feel comfortable with. And guess what: the more you touch, fondle and orgasm, the more you'll be smiling - it's the greatest feedback loop ever!

Isn't the human body a marvel of engineering?
The Love Goddess

I had no happy ending in today's session, but still I felt very happy with that endorphin high. It seems to last many hours. I went to the gym and the first thing a friend said to me is, "You look very happy, I can see it in your face". And this friend never said anything like this to me in my ten years of knowing him!

How come masturbation does not produce these results? Is it all mental or does the thrusting work help create this high?

It caused too much buzzing when I got back to the office.

Unfortunately, I am now suffering from an awful headache after around 24 hours from my session. I must have OD'ed on that Oxytocin or something!

It's not the sex, it's the after effect of the Viagra

Yes indeed it is marvellously engineered.

How can you possibly have a smile when you spent good money not to enjoy the best part of the session.  Although, it could be that you're smiling as a beautiful lady that normally would never give you the time of day, just allowed you to have sex with her.