Nothing to do with staying up late.
Listen, I'll tell you what to do, but someone will delete my post and infract me because they'll think I'm bullshitting you.. But I'm not.
Next time you're in the shower, stick your fingers up your butt and massage your prostate. The muscles in your rectum will sort-of tighten up after a bit and it will feel good. keep going and you're body will naturally push, like you're taking a big shit. I don't really know how to describe what to do, but honestly it works. I have a dildo that I use in the shower and it tends to dislodge anything that should have come out already... I would suggest this, but most people don't have a dildo.. You'll know when it's coming because you'll feel it in your stomach.
You'll have to work at it and find your own method because it's different for everybody. This is not specifically for helping you defecate (more for anal pleasure), but it will work, guarantee.
Also, try an enema. If you don't have an enema bottle and don't want to buy one, just use an empty water bottle. Fill it up with water in the shower, put the top in your anus, and squeeze the bottle. Pull the bottle out and push out all the water. It may take a couple tries, but eventually you'll see the terdlets come out with the enema water.
Both methods work, from experience.
