Chances are Scatterbrain it is done because their religion allows it to be done.
A Muslim man can marry a girl younger than nine years of age, even if the girl is still a baby being breastfed. A man, however is prohibited from having intercourse with a girl younger than nine, other sexual acts such as foreplay, rubbing, kissing and sodomy is allowed. A man having intercourse with a girl younger than nine years of age has not committed a crime, but only an infraction, if the girl is not permanently damaged. If the girl, however, is permanently damaged, the man must provide for her all her life. But this girl will not count as one of the man's four permanent wives. He also is not permitted to marry the girl's sister."
So You need not fear that your Muslim male baby-sitter will rape your 7-year-old daughter. If he is a good Muslim he will only sodomize her. If he does have intercourse with her he is obligated to pay for any surgical repairs that may be required. If those repairs are deemed insufficient you may work out a financial settlement to compensate you for his trivial infraction. No big deal. Muslim boys will be Muslim boys. And, after all, she is only a girl. Muslim's see their women through different eyes than what we do. No matter if they are young or old. They are just there for Muslim men to rule over and do as they wish, and yes its because of their religion.