EDIT:
Suppose a game has a DEX-check, Balance skill or similar sort of resolution framework for resolving my PC walking a tightrope, or fighting on a cliff-edge, or similar. No matter how much my "mental model" of my PC has it that they are poised, graceful and unflappable, the outcomes of that resolution framework make it possible that my PC will take a tumble.
Now that tumble might be narrated in different ways - maybe my guy fights with all the skill of the Man in Black, but an even better swordsman forces my guy to the edge of, and then over the cliff; or maybe, especially if the mood of the table is more light-hearted, my guy slips from the tightrope, falls into the river, and looks a bit of a dunce.
I see the seduction example the same way: Sir Morgath, despite his resolution to remain faithful to his wife Elizabeth, finds himself simply unable to resist the charming and beautiful Lady Lorette; Sir Gerren, the day before he is to enter into a political marriage which it is agreed will remain unconsummated, throws care to the wind and enjoys a romp in the bushes with the same Lady.
The player doesn't always get to decide whether their PC, in actuality, lives up to the ideal or image they have for them.