It’s always been a risk to men that consent can be revoked post facto when a woman “changes her mind” days, weeks, months or years later. It happens fairly frequently. This doesn’t make all women evil, but some are. Thus, it does mean being extremely careful, especially around those less stable.

And no, not even a videotape of you getting consent, having sex, and then verifying consent afterwards will save your ass when she does change her mind later.