20-40 online very loose table

[largos]

Hi!
I was watching my friend play at a very loose/aggressive online game.
The game is 10-handed but only 6 playing and my friend gets 4h5h UTG and limps.
UTG+1 who is a fish raises and the next player who is a medium player reraises. SB(callingstation)and BB(unknown) calls and so does my friend.

Now to the question. After the hand I asked my friend why he called with that hand and he says if I hit I `ll probably win a big pot. I agreed but said that he probably should have 4-capped it giving him better odds on flop and a little more deception to the hand . He disagreed and said it was bad play.

All thoughts and comments welcome!