Hey buddy
I could write a lot about that you should start to eat more if you want to gain more weight. But also have in mind that when you're eating more calories than you're burning and you're not working out - you'll actually gain fat.
If you're very underweight it won't be a big problem gaining few kilos of fat, but gaining to much bodyfat isn't good either. You can check your bodyfat percentage in good gyms, best one would be DEXA scan I guess.
If you're struggling gaining weight then - eat more, simple as that. I had the same problem when I was young, until I've really put off my pink glasses and was keeping track of eating more. By that I don't mean that I ate 2 pizzas a day, I mean that I was going for at least 3500+ calories until my body changed. Also I wouldn't recommend you to eat lots of BS calories like sweets and soft-drinks, either go for 50-75% healthy and if you can't go past 3500+ calories, do another 25-50% of junkfood.
I've always ate healthy first and then have filled myself up with junkfood afterwards. Because junkfood tastes 'better', so it's easier to eat when you're already full.
Also I started watching 'motivation videos' while I was eating. Don't use plates, use bowls and eat like your f*cking life depends on it LOL
Take it serious and don't be that guy that says 'I can't gain weight, I'm eating sooo much (1-2 pizzas a day + 1 choclate bar) and I can't gain weight. That's what lots of people in my school said and I was like 'wtf? what you're talking about. I'm eating twice as much as you so don't tell me you're eating much'.
I'm mostly eating plant-based, don't recommend any of that just protein, meat and dairy thing, but I loved (still love) Rich Piana as motivation when I was eating.
https://www.youtube.com/watch?v=uSrsk6tbnkE
In your last post you wrote that your weight is decreasing when you're masturbating. Do you weight yourself before and after masturbating and your weight is 1-2 kilos less? Maybe that's just in your head. It maybe has an effect when you're extremely professional in bodybuilding with juicing and all and then you're shooting your load that you won't gain 100% as much muscles as without doing that, but it's not proven, talking about gaining muscle mass here, not weight.
With weight it's simple, ~7000kcal = 1kg (2.2lbs) fat
Gain weight = eat 7000kcal more than you're burning
Lose weight = burn 7000kcal more than you're eating
With fast metabolism it's a little different but try to take it serious, watch motivation videos beside eating, eat out of bowls, not from plates.
In the beginning sometimes you will get that 'I need to vomit feeling', it's normal LOL as you're condition yourself to eating more, your stomach will grow, then it will be easier to eat more.
Also drink 3-5 liters of water, don't drink much softdrinks or eat too much sweets because I had the feeling that it was contraproductive for me gaining weight when I was young + fast metabolism. It may happen that you'll need to take a dump 2-3 times a day then instead 1 time a day LOL It's no problem.
Try to sleep 6-8h per night, don't let you stress too much from things, as stress is also a bad thing for the body.
If you really take sh*t serious, track your calories for 1-2 weeks that you're above 3500+ kcal.
I can 100% guarantee you that you will gain weight!
Weight yourself in the morning after taking a dump. With that way you'll be able to track your progress of gaining weight at least a little bit accurate.
If you don't gain weight with 3500kcal, go for 4000kcal, still don't gain weight? Go for 4500kcal and so on. Btw. for sure I mean that as daily intake LOL So everyday 3500kcal!
Also it would be important to know if you're using lots of sports or having a physical job? For example if you would work on construction then it may be possible you're burning 4000-5000kcal a day. For heavy weight gaining, try to be 1500kcal-2000kcal above your burning calories, so it will guarantee that you're gaining weight
But there's no way that you're actually losing weight because of masturbating if you don't have mastubation sessions of a few hours a day burning a couple thousand calories bro LOL
If you take yourself and the problem serious, track your calories - 100% you'll gain weight with this strategy.
There are also things like health diseases, for example an thyroid over function, that would cause a very fast metabolism and that you won't be able to gain lots of weight. But as you're already gained like 6kg, I doubt you have that problem.
Anyways, if you really think it's because of your body and not because you're eating to less - let a doc check your thyroid stats.
Hope that helps a little bit
