The ITV2 show sees single men and women put together in a Majorcan villa to find love and win a Â£50,000 prize.
So far this series, there have been several instances of, shall we say, intimate behaviour taking place.
But broadcasting regulator Ofcom says it has actually received far more complaints about scenes that show the contestants smoking.
The series airs after the 21:00 watershed but has still attracted 46 complaints to date.
More than half of those - 24 - were from viewers objecting to the portrayal of smoking.
Fifteen of the complaints were made about the promotion of "sexual material and promiscuity".
The remaining complaints were for bad language, grievances about a racial slur and violence (for the time when a contestant threw a cushion "aggressively").
Ofcom has said it will assess the 46 complaints before deciding whether to investigate further.
The ITV2 show has a large following and an audience that includes pop singer Adele.
Speaking at the second of her Wembley dates last week, she labelled one of the contestants a "tramp" for taking part in a show in which "real people have real sex on real TV".
Falling in love isn't easy - let alone falling in love on national television, writes entertainment reporter Genevieve Hassan.
But that's what 13 sexy singletons hope to do on Love Island, which is halfway through its third series on ITV2.
If you've never seen it before, the premise is to couple up and convince the public to keep you on the island in order to win Â£50,000 - all while trying to find your perfect match.
Think Big Brother but with board shorts, bikinis and more under-the-sheets shenanigans than you can shake a stick at, as the couples chop and change throughout the series.
Follow us on Facebook, on Twitter @BBCNewsEnts, or on Instagram at bbcnewsents. If you have a story suggestion email entertainment.news@bbc.co.uk.

The officer, Ahmed al-Mreyssi, died after being repeatedly run over during anti-government protests.
The court upheld a life sentence given to a second man in the case.
Bahrain and its Sunni royal family have been shaken by unrest since pro-democracy protests began in 2011. Most protesters are from the Shia majority.
The death sentence was confirmed on Wednesday for Ali al-Taweel, and the sentence to life imprisonment for Ali Shamlo.
Lawyers for the two men have said they will appeal against the decision at the court of cassation in a final effort to have the sentences reduced.
Bahrain's largest opposition political party Al Wefaq denounced Wednesday's decision and said confessions used as evidence in convicting the two men were extracted by torture.
The Gulf island kingdom has been wracked by nearly two years of violence that followed the clearing of an iconic landmark, Pearl Roundabout, in the capital Manama, in February 2011.
As violence escalated 35 people, including five police officers, were killed. Hundreds more were hurt and thousands jailed - the vast majority Shia Muslims.
Since then, opposition and human rights activists say another 45 people have been killed, a figure which the government disputes.
In October last year two policemen died of injuries sustained during clashes with protesters in villages outside Manama.
Last December, a Bahraini court commuted to life imprisonment the death sentences of two other protesters convicted of killing two policemen in another incident in 2011.
Viewers have been complaining about Love Island - but not for the reason you might think.
[NEXT_CONCEPT]
A Bahraini appeals court on Wednesday upheld a death sentence against a protester convicted of murdering a policeman in March 2011.