Draw hand

Five card draw is one of the most common types of poker hands. Each player is dealt five cards, then a round of betting follows. Then each player may discard up to 3 cards (4 if your last card is an ace or wild card, in some circles) and get back (from the deck) as many cards as he/she discarded. Then there is another round of betting, and then hands are revealed (the showdown) and the highest hand wins the pot. So you are the dealer at a five card draw game (against four other players, Alex, Brad, Charley and Dennis (seated in that order to your left). Everyone puts a nickel into the pot (Ante) and you deal out 5 cards to each player.
You deal yourself a fairly good hand Ks-Kd-Jd-5c-3d. A pair of kings isn't bad off the deal (not great, but not bad). Then the betting starts...
Alex 'Checks' (checking is basically calling when you don't owe anything to the pot).
Brad bets a dime.
Charley calls (and puts a dime into the pot).
Dennis raises a dime (and puts twenty cents into the pot).
Well, it's your turn. Twenty cents to you. You can fold, call or raise. Like I said before, pair of kings isn't bad, not good but not bad. You call and put twenty cents into the pot.
Back to Alex, who grumbles and tosses his cards into the center of the table, folding. (Note, when folding, never show your cards to anyone).
Brad calls. The total bet is twenty cents, but he had already bet a dime, so he owes a dime, which he tosses into the pot.
Charley is in the same position as brad, and tosses a dime into the pot.
The round of betting is over. After Dennis's raise, everyone else folded or called (there weren't any raises) so, everyone is all square with the pot. Now everyone can discard up to 3 cards. Brad discards 3 cards, Charley discards one card, Dennis discards two cards. (You deal replacements to everyone) and now it's your turn. You have a pair of kings, three spades, and no chance for a straight. It's best to just keep the two kings and hope to get a 3rd or fourth king. You discard three cards, and your new hand is: Ks-Kd-Kc-4c-8h. Three Kings! A nice little hand.
What do you suppose the others were trying for? Well, Brad kept two cards, so he probably had a pair (just like you) but it probably wasn't aces, so even if brad got a three of a kind, you probably beat him. Charley kept four cards, so he was probably trying for a straight or flush. (If Charley had four of a kind, he might have bet much harder). The big problem is Dennis. He raised earlier, and only drew two cards. He might be bluffing, but he could have had three of a kind off the deal... In any case, the second round of betting starts (with dealers left).

Well, the betting is over, everyone reveals his hand: