In my experience .... They get nuts after 40. I think it is a mix of raging hormones before menopause and getting it before they think they lose their looks.
And ... it keeps on going. Women in their 50's and 60's really like to experiment and have steady sex. My SO decided about a year ago to get into anal sex, hand jobs and bj's like the world was going to end tomorrow. My cock was raw. Another woman I know at 48 began experimenting with being a love slave.
For all of you that had your stomach turn at the thought of all these "old" people doing it .... Not all of them let their bodies and attitudes go. Will you stop?