Some masturbate and have sex more often than others (the ones with less sperm). And others, dont have sex as often, thus causing them to have more sperm than the other. Or it could be that his ball sack can produce sperm faster
Some males are gay, meaning they are attracted to other males, while others are heterosexual, meaning they are attracted to females. Sexual orientation is a personal characteristic that varies among individuals.
some have peploe on it and some dont
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Males develop a hooked jaw to make it easier to bite other males when it is time to mate. Some males have longer, pointier jaws than others.
some dont trust it others a dummies
some do others dont
Some live there others dont.
some do, others dont
Yes, there are some species of stingless bee; and in the others it is only the females that have stings, the males do not.
Female lizards can be larger, smaller, or the same size as males, depending on the species. In some species, females are larger to accommodate egg production, while in others, males are larger for territorial or mating purposes. Size dimorphism varies among lizard species.
yes some have spikes and some don't.some have bumps and others dont
All males have an Adam's apple (Adam, get it?). Some are just more pronounced than others.