was it implies the best idea Touka came up with while thinking of ways to stop Kaneki from running off recklessly and getting killed, was to take his virginity?
No, Touka isn't the best explaining her own feelings, what Touka meant is she wanted to stop kaneki from wanting to kill himself through love as she knew he as Sasaki had feelings for her. She wanted to make him feel loved and stop seeking that in his self sacrifice for others.