Excluding yourself from provocative games like "spin the bottle" or "truth or dare".
This person also is a virgin and avoids situations where there are people of the opposite sex.
This person is disgusted with sexual contact and should probably become a nun.
This person also comes up with stupid excuses to attend social events.
Claire: "No, I'm really sick so I'm going to stay home so that I can go to the dance tomorrow night."
Jake: "Hey, where's Claire?"
Fred: "She's pulling a Rachael."