On a normally entirely suitable for small DCs free PC games site.
The DDs have messed about on zylom.com for as long as we have had a PC ie about 10 years.
DD2 (11) has a cold so she's playing sitting on my knee being huggy, when the pre game ad comes on.
It's shows a young couple kissing and then him clearly having sex with her and her telling him to stop. You then see him looking in on himself realising what he's doing and the home office logo comes up.
DD knows the facts of life and was just a bit shocked as she said that's ok for me now, (she spends her life geting SIMs PG), but not when I was 6!