If you see two lizards mating it means they are in love with each other and are wanting to produce baby lizards.
Male alligator lizards for example will often bite the female lizard behind their head to hold her in place.
This is a form of the lizards love bite or courtship and can look like a fight.
However it's actually a natural part of the lizards mating process.
The bite old that the male lizard does to the female lizard is a way for the male lizard to secure their mate and prevent other male lizards from trying to mate with her.
Pairs of lizards have also been observed together in bite holds for over 48 hours and some even over 50 hours.
The male lizards prolonged bite hold can also be a way for the male lizard to demonstrate his strength as well as worthiness as a mate to the female lizard.
Pairs of lizards that are in bite holds which are prolonged can also mate multiple times.
And in some cases, lizards may sit on top of another lizard to assert their dominance, which can look like a pair of lizard together.