The NSPCC said it was welcome to a debate on the lowering of the age of consent but would want to see the evidence for the claims it would benefit 15-year-olds.
The children's charity's head of policy David Tucker told the Sunday Times:
Has there really been a significant change in the amount of young people having sex over the past 20 or 30 years?
If it has changed, then is reducing the age of consent the most sensible way to deal with it?
More top news
At least 13 people are said to have been killed by a car bomb outside a Turkish stadium in an attack which reportedly targeted the police.
Syrian government forces are continuing a push for total control of Aleppo, while a reported 20,000 civilians left the city on Saturday.
Rex Tillerson is president of Exxon Mobil and has close business links to Russian President Vladimir Putin.