Hi,Raja thanks for query.
Ans.1-this is normal,known as pre cum
may due to some muscle stretching due to bad posture,lack of exercise etc.
ans3-No problem in future.
ans.4-no,it can not
ans.5-try to avoid staying alone,concentrate more in work,avoid reading or watching provocative material like books,movies etc.
Do not worry you will not have any problem in future.
wishing you good health.