Why do Male SeaHorses give birth

do the female seahorses impregnate them? hmmm...

Good question.
Yes, it's the male that becomes "pregnant".
During mating, the female inserts her ovipositor (an organ used to insert eggs) into the male's brooding pouch and deposits several eggs. The male releases his sperm into the seawater so that the eggs in the pouch are fertilised.
After several weeks, the eggs hatch in the male's pouch. The male expels the baby seahorses from the pouch with muscle contractions. Typically seahorses give birth during the night.

the female seahorses implant the fertilized eggs into the male seahorses, where they are incubated and finally "born"

because the people who were saying which is which were drunk.