71 per cent of millennials, people aged between 18 and 35, still believe in marriage

Two-thirds said they believe schools need to offer more sexual education classes

Nearly 40 per cent of Millennials in the US believe that sexual relationships between two people of the same gender are ‘immoral’.

According to a recent survey of 2,300 US adults between the ages of 18 and 35 from the Public Religion Research Institute (PRRI), when it comes to homosexual relationships, 38 per cent report that they believe 'sex between two people of the same gender' is morally unacceptable.

Similarly, 37 per cent of the people who took part in the survey believe that casual relationships are also wrong on a moral level.

Changing times: Same-sex couples began marrying in Alabama in February (pictured) . Gay marriage is now the norm in more than 30 U.S. states, but 38 per cent of Millennials believe it to be immoral

However, on the flip side, 42 per cent of those surveyed believe that a sexual relationship between two people of the same gender is morally acceptable.

The poll also shows that more Millennials think that sex between two people of the same gender is more acceptable than casual sex between two people who have no intention of forming a relationship.

The survey examined how Millennials who are affiliated with different races and religions view different aspects of sexuality and reproductive health, with a diverse and varied number of participants taking part, including a large number of people who stated that they do not consider themselves to be affiliated with any religion at all.

Of course, in the past, there has perhaps been a common assumption that most religious people are conservative on most social issues, but this survey suggests that the old values don't always ring true in every way.

Work to do: About twice as many young people, meanwhile, say homosexual behavior is morally acceptable than having an abortion

Sacred views: When it comes to contraception, Millennials are overwhelmingly unopposed (L), and many believe that more needs to be done to emphasize safe sex and birth control among young people (R)

When it comes to contraception, for instance, Millennials are overwhelmingly unopposed, with 71 per cent overall saying that birth control is either morally acceptable, while 14 per cent believe it can be right depending on the situation.

On the other hand, only nine per cent of participants stated that using any form of contraception is morally wrong.

Millennials are still divided on a number of issues however, like abortion, with 33 per cent of those surveyed believing it should be legal ‘in most cases’, while 27 per cent believe that the procedure should be illegal the majority of the time.

However, despite a minimal amount of support for the procedure, Millennials are far more hesitant than previous generations to label themselves as pro-life and often take a more nuanced view of the situation.

Divided issue: Millennials appeared unwilling to categorize themselves with labels like 'pro-life' or 'pro-choice'. When asked whether it was morally acceptable to have an abortion, 39 percent said it depends

Many appeared unwilling to categorize themselves with labels like 'pro-life' or 'pro-choice'.

When it comes to the participants’ moral views on abortion, 39 per cent said it depends on the particular situation.

The stark differences of opinion are really brought to light when race and religion are taken into account.

For example, 49 per cent of white Catholic Millennials say that abortion should be illegal in all or most cases, with 55 per cent of Hispanic Catholics, 61 per cent of Hispanic Protestants and 80 per cent of white evangelical Protestants in agreement.

Facts & Figures: Millennials appear to be more accepting of homosexuality than of abortion

In fact, the survey hints that many religious Millennials are actually fairly progressive on many traditionally conservative issues.

Almost a quarter of Millennials said they received no sex education classes in middle or high school. Perhaps as a result, two-thirds of Millennials surveyed said they favor teaching comprehensive sex ed classes in public schools.

'One of the things that stands out as a big picture finding is that Millennials are a little reluctant to make black and white moral pronouncements about issues,' said Robert P. Jones, the CEO of PRRI who carried out the survey.