Male lions get erections the same way as males of other species, either spontaneously or upon arousal.
Basically shemales are male, so naturally they will have erection...
Occasionally. But only if they are male.
You do if you're a male and nothing is wrong with you-even babies will get them on occasion.
Yes, just like with any other male mammal including humans.
because the blood flow to the penis is slower.
Not in standard urination. However, after erections, men often need to urinate, this is a biological function designed to "keep the pipes clean" and free of organic materials.
Male dogs typically extend their penises prior to mating. Male dogs may be unable to control their erections during times of extreme excitement or stress.
In fifth grade you learn the basics of the male & female anatomy. They also explain erections, & pregnancy.
Yes, and it is normal for very young children to get erections. Male babies can even get an erection while still in the womb.
hormones
Your testes control male characteristics. Testes are not glands. They are organs.