Reasons
Prostitution: Unmonitored, it is good for transferring STIs.
Nothing IMMORAL about transferring STI's when people are well aware of the risks involved and choose to do it anyway
And also, if this is your reason why don't you view casual sex as immoral? because that's how most STI's are transferred
Then the hospital system is burdened with cases that could've been prevented. Government regulation, including strict health checks, would make it good in my eyes.
That's a problem with socialised healthcare, not solicited sex
Illegal drugs: Similar to prostitution, clogs up the hospitals. If small doses were medicinally beneficial, then yeh it'd be good, but I'm not sure so I'm going to assume it's similar to smoking (which I oppose).
again, problem with socialised healthcare
Incest: Sex with sibling/parent/cousin? Ew
Wow, intellectual giant here folks.
"EW I find X behaviour gross so therefore it is immoral"
Bestiality: Sex with an animal, maybe the animal dun wanna get screwed? It doesn't work.
I'd imagine that most people who engage in bestiality at least try to make it so that the animal wants to engage in intercourse, primarily because it would be more enjoyable this way, and not just physically.
plus if it's a chick having sex with the animal then the animal must want to have sex with her
also, how is an animal having dick when it doesn't want dick any worse than the things that animals raised for consumption have to go through on a daily basis?
Nudity: Maybe a 10 year old child doesn't want to see some 50 year old man's penis in public?
So? I might not want to see your face in public, but by seeing it, or the girl seeing the man's penis, mine nor the girls rights are being violated so we can just suck it up
Necrophilia: Lack of respect for the dead, using the body more as an item.
I believe the body becomes property of the deceased person's next of kin, so obviously having sex with it without their permission would be violating their property rights
however, the act itself is not actually hurting the person. I mean, sure, the thought of some dude rooting my dead body seems absolutely revolting, however, when I die I won't care, because you know, I'll be DEAD and hence incapable of caring.
Gambling: When controlled, it's good. I'm concerned with the impacts of losing one's income on those around the person, like the ripple effect. If someone has 2 kids and blows their year's salary, then the children are worse off when they did nothing to instigate it. However, I have no probs with losing like $20 in a night at Vegas if you had fun.
You don't have a problem with gambling, you have a problem with fiscal irresponsibility.