Sexy Selina (A Hypersexual Diary: The Adventures of Mr. Curvy, Chapter 22)

Ron is an admitted hypersexual- someone who is obsessed with sex and feels compelled to engage in frequent sexual activity. As an independent consultant and as an instructor at a local community college, he has the opportunity to meet thousands of young women in all manner of situations- and many of them wind up naked in his bed.
Although solidly in middle age, he has a rock-hard body and a rugged look, emphasized by a closely trimmed beard and tattoos on both arms. Due to his compulsion, he has had sex with hundreds of women in all manner of situations. Over the course of these adventures, he has learned something about how to give a woman pleasure, heightened by a unique anatomical feature. An old girlfriend bestowed the name "Mr. Curvy" to it, and that name has stuck.
The Mr. Curvy stories are accounts of some of Ron's more recent adventures, and are true stories; they actually happened exactly as they are described, except that the names of the women and other characters have been changed to protect their privacy.
In newly re-written Chapter 22, Ron's day is already good, because of the pretty new receptionist who greets him when he arrives for a dull weekly business meeting. But the day turns much better when the young redhead gives him a delightful surprise- joining him in an after-work romp that leaves both of them drained.