Statistics

British Crime Survey estimates that up to 15% of the adult population of the UK have been sexually abused in childhood.  This includes 11% of young men. 
1.5 per cent of men had suffered a serious sexual assault at some point in their lives with 0.9 per cent reporting rape. The equivalent figures since 16 were 0.5 per cent and 0.4 per cent.

About 3% of men — or 1 in 33 — have experienced an attempted or completed rape in their lifetime 

(National Institute of Justice & Centers for Disease Control & Prevention. Prevalence, Incidence and Consequences of Violence Against Women Survey. 1998).

NSPCC statistics indicate that 16% of children aged under 16 experienced sexual abuse during childhood.

Overall, 11% of boys and 21% of girls aged under 16 experienced sexual abuse during childhood.

The majority of children who experienced sexual abuse had more than one sexually abusive experience.

Three-quarters of sexually abused children did not tell anyone about the abuse at the time. 27% told someone later. Around a third still had not told anyone about their experiences by early adulthood.

At then population levels, that means there were at least 2.5m young male adults who had been abused and never told anyone.

1% of children aged under 16 experienced sexual abuse by a parent of carer, and a further 3% by another relative.

11% of children aged under 16 experienced sexual abuse by people known but unrelated to them.

5% of children aged under 16 experienced sexual abuse by an adult stranger or someone they had just met.