I would say fear of pregnancy or hormonal urges tbh !
The answer to this question is: 20%
These demographic of students are the mixture of the students who want to focus themselves on the study, have some sort of medical illness that prevent them to do so, or the students that simply have a general personality that do not find being around alcohol and social situation very pleasant.
True, that's why its known as a ''complex trait'', which mean that is usually caused by a mutation in gene.
Explanation:
the answer to your question is you're probably hungry or just need to go to the bathroom