Putting on weight is just as difficult, ok

I thought i can finally put on some weight after weaning my toddler off two months back. I was wrong. I'm still scrawny even though i make it a point to eat as much as i can all day long. Now, where did all the food go to? I still go to the toilet the same number of times each day. Friends tell me to eat protein-rich foods as it will help me gain weight. Let me tell you this. Gaining weight is just as difficult as trying to lose it. But i guess for the skinny ones like me, at least we get to eat as much as we like compared to those who needs to lose weight. If you need tips on how to lose weight fast, then click here. I still have yet to find a solution on how to gain weight fast....