Transgender hormone therapy (male-to-female) orchiectomy still experience morning erections. Voluntary erections may or may not be possible, depending on the amount of hormones and/or antiandrogens being taken. Managing long-term hormonal regimens have not been studied and are difficult to estimate because research on the long-term use of hormonal therapy has not been noted. However, it is possible to speculate the outcomes of these therapies on transgender people based on the knowledge of the current effects of gonadal hormones on sexual functioning in cisgender men and women. Firstly, if one is to decrease testosterone in male-to-female gender transition, it is likely that sexual desire and
Sexual selection in mammals neck length is not correlated to increases in other parts of the body, which would be expected from foraging selection, so sexual selection may be a more satisfactory explanation. Studies have failed to resolve the causes involved: perhaps the neck was a result of both or other forces. Precopulatory mechanisms determine who father an offspring prior to sex. Male-male competition is the biggest precopulatory mechanism in mammals. Sexual dimorphism is a result of male-male competition that is easily seen in species. Male-male competition to copulate with the opposite sex is often seen in mammals. African elephants strongly promote male-male competition.