Does sex really increase cancer risk?

A study published last week, and covered on 6minutes, claims to have found a link between having had 10 or more sexual partners and an increased risk of cancer.
But it’s not as simple as that.
The evidence from this study isn’t strong enough to conclude that having had multiple sexual partners increases a person’s risk of cancer.
Misinterpreting these findings could lead to stigma around STIs and having multiple sexual partners.