Short answers, pulled from the story.
The concept of pudor regulated public and private life for citizens by enforcing shame or modesty. A paterfamilias held absolute authority over his household including the right to govern the sexual conduct of all members within it.
Proper male sexuality required taking the active role as a penetrator while allowing oneself to be penetrated threatened liberty as a free citizen. Hypersexuality faced condemnation from both medical practitioners and moralists regardless of gender.
A series of erotic scenarios was discovered in 1986 and published in 1995 at the Suburban Baths in Pompeii. These scenes included oral sex, group sex involving male-female, male-male, and female-female relations intended to amuse viewers.
Marcus Crassus faced prosecution for incestum with Vestal Licinia sharing his family name in 73 BC though he was acquitted. Three Vestals convicted in 114 BC had sex with several men of governing class leading to founding temple to Venus Verticordia.
Lucretius wrote De rerum natura mid-1st century BC presenting Epicurean philosophy within Ennian epic tradition describing onset of physical maturity generating semen causing wet dreams. He treated male desire as pathological frustrating violent comparing ejaculation to blood spurting from wound.