thank you for the many answers and good tips

I've been thinking while i was at work about all of this and iIve decided to make a little tabletop perch for Sisu. This way he can still be watching TV and at the computer with me, but not be on my shoulder.
Now i just need to find out how to actually make him sit there

has been acting strange all day though... First off, when i got up in the morning, he was overly cuddly. As in, it took me 10 minutes to change his water and feed him because he would rub his head against my hand while lolling his tongue. This isn't what i would call weird.... he's been a cuddle monster for about a week now. but after the ordeal yesterday, i would have thought he would be at least a bit reluctant of my hands.
Then i came back from work and i noticed his seed mix had been spread all over the floor like 2 feet away from his cage. How did he even do that?

i didn't think a 150g bird would have the torso strength to fling things that far

Then my boyfriend informed me that he had been doing extremely loud bird calls and chatter all day, which is unusual. He claims he takes a nap or two during the day normally, and he spends most of the rest of the time playing with the toys and watching the bunnies or just hanging out.
So i went over to the cage after cleaning up the mess, and offered him pieces of grape and peanut, which he initially accepted, only then to fling them away. (he's done this before, during the first 2 days after his arrival). So i told him, my cuddle monster is pouty! And he then started with some more really loud chatter, and rattling his beak on the cage bars. I offered him my hand to come out of the cage, he pecked it and then demonstratively walked away and climbed to a higher perch.
I then gave him some harrison's pellets, a pinch of his old seeds and small pieces of apple. I then filled up his bowl of water and left.
As soon as i sat down by the computer, i heard a splash. So i turn around and he is taking a "bath" in his water bowl :s ( actually just diving in chest first, cause his bowl is not big enough to fit the entire bird) He hates water, so no clue where that came from.
So then i spent about 30 minutes doing mimic with him from my chair at the comp, let's say about 10 feet away from his cage. Normally it's just clicks, 2 different whistles and kissing noises, but today he said "hello!" and quacked like a duck. Never heard him do that before.
After a while he started screaming so i ignored him, as i want to discourage loud noises. He must have figured it out though, because he then started crying like a baby. A human baby. Or maybe a cat, not sure. Either way, weird!
Went over to the cage to observe him a bit better, to try and see his body language. He lifted his wings half way up, puffed his feathers a bit, and then started making circles with his head. Like a bob, only a full circle. While singing.
Now I'm a noob, so this could very well be aggression, but i sort of got the impression that he was showing off instead.
Tried to get him out of the cage by inviting him to step up, and he backed off. So i closed the cage again and walked away. Before i could sit down, i hear the cage door open and he is there waiting for me. So i come over and he climbs on my shoulder as usual. (Still haven't completed the perch so i don't know what else to do!)
He's been asking for cuddles since. He also rubs his beak against my nose, walks from a shoulder to the other through my chest rather than the back as he usually does, and grinds his beak together with the eyes closed.
I am confused. My little birdie is very expressive and he doesn't give me a break to learn what he's trying to say, just tosses everything at me
Is it possible he's going through a hormonal phase? can male parrots do that?