Welcome to HCM.
when we feel like hungry, we eat, when we feel like thirsty, we drink water. Similarly when we have urge for sex (before marriage) masturbation
is healthier option than going for premarital sex where so many risks are there.
In a person aged 23 years, testosterone
exhaustion is not common. So you need not worry.
Human penis even in flaccid stage has a tendency for shrink according to climate or when you are inside water for a long time. Similarly scrotum
also will raise up and appears shrunken. When it got stimulated it will attain normal size. There is nothing to worry.