A lot of scenes where the people watch videos of them and the couple may have a bit of sex and kissing. Though from what i have seen ( very little), there shouldn't be any sex.
Since this is a reality show about love, there will of course be some conversations about sex or kissing.
Note: All of these notes come from the very little i've seen of the show.
One episode has a couple in a boat full of heart ballons, and a bit of awing and gasps. A kiss and a hug.
There is also some kissing and hugs in the other videos from that couple.