HHi dear.
I had gone through your query.
I understand your concern.
You need to learn sex education and knowledge.
Masturbation is normal and physiological function of the body.
Sperm production occur in
scrotum 24 hourly.
It has no connection with any other body system.
Weakness after masturbation occur due to calorie consumption while doing it just like any other physical activity ex. Running.
Pimples or
acne has many causes like infection or
hormonal etc. It is also not related to masturbation.
Masturbation is just like sex in absence of partner.
so it is normal and do not think much.
Relax.
Consult dermatologist for pimples.
Read and learn from Internet about sexual functions and remove myth from your mind.
Still if you have a query then feel free to ask.
Happy to help you further.
Thank you.