Lord Hanuman is considered as Sreshta Brahmachari while Bhishma, Naishtika Brahmachari.
Sresta means noble, the Best.
Naishtika Brahmachari is one whose Semen does not fall down towards the Earth,
I shall be posting a detailed article on this.
Hanuman is called a Brahmachari, A Celibate and a Jitendriya, one who has conquered the senses.
How come he is reported to have a son?
Hanuman, after burning Sri Lanka(having his tail having been set afire by Ravana), tok a dip in the Ocean, to cool of His body, a drop of His perspiration dropped from His Tail.
This fell into the mouth of a Fish,and it delivered a child.
The child was named Makaradwaja.
The term Makara appears many a times in the Puranas.
The word Matsya is also used to indicate Fish.as in Vishnu’s Matsya Avatara.
As Sanskrit does not use the same word for the same object, I am inclined to think that Makara and Matsya belong to a group of the Fish Family, akin to Dolphin and Shark.
Makaradwaja became the Guardian of the Patala Loka of Mahiravana.
As I have written earlier the Patala is the Americas.
Makaraddwaja is worshiped in La Ciudad Blanca as a Monkey God,
Please read my post on this.
La Ciudad Blanca (pronounced: [la sjuˈðað ˈblaŋka], Spanish for “The White City“) is a legendary settlement said to be located in the Mosquitia region of eastern Honduras. This extensive area of virgin rainforest has been the object of study for many people. Archaeologists refer to it as the Isthmo-Colombian Area of the Americas. Due to the many variants of the story in the region, most professional archaeologists doubt it refers to any one actual city of the Pre-Columbian era.(wiki)
Ancestors of Pre Columbian were the Tamils.’