If you practice safely, it doesn't have to be - from a physical point of view. The more people you involve in a sexual activity, the higher the risk of contracting an STD (assuming you don't know their sexual backgrounds).
From an emotional point of view, it can be harmful. If you are normally in a monogamous relationship, you could risk getting hurt or your partner getting hurt by the activity. Sex and emotions can be a dangerous combination.
No,but they will get pregnant if the child is having sex with a man
A sex group is a group of organisms that reproduce sexually, typically within a species. Members of a sex group have the capability to interbreed and produce offspring with genetic variation.
Not Harmfull but do sex when you need do not do sex when your partner is tired be relax
If the couple engages in safe sex practices, group sex is just as safe as any other form of sex.
Group Sex - film - was created on 2010-08-04.
Not if all is normal
Physically, possibly not, though it depends who he has sex with. If precautions are not taken then the probability rises.
sex
He will pass this harmful sex-linked gene on to his daughters. Sons will inherit their Y chromosome from their father, not his X chromosome.
1. to approach with harmful intent 2. To solicit for sex.
Sea anemone are cnidarians.
harmful intentional by a small number of dominant and group members with out direct support of norms and most other dominant group members. and example would be hazing, which is illegal but it can still happen with harmful intentions that are supported by a small number of a dominant group like a sorority.