Final answer:
Rebecca is likely reflecting on the practice of 'hooking up,' a form of casual sexual encounter that differs from the traditional dating and courtship practices of her grandmother's era, which also had a prevalent double standard in sexual behavior.
Step-by-step explanation:
The contemporary practice that Rebecca is wondering about is likely hooking up, which is a modern phenomenon where individuals engage in casual sexual encounters without necessarily having a committed relationship. This is in contrast to the more traditional practices of dating or courtship, where romantic involvement typically precedes sexual intimacy and often involves an element of exclusivity or the intention of seeking a long-term partnership.
Rebecca's grandmother's experiences reflect a time when there was a clear double standard regarding men's and women's sexual behavior, with more freedom traditionally afforded to men. Whereas today, the concept of hooking up may reflect a shift towards more egalitarian social standards, though double standards still exist in various forms.