Is it valid to vow to fast two days for each time one practices masturbation by hand, or does this include masturbation by thought and rubbing over clothes? What is the ruling on practicing anal sex? Is this considered an act of the people of Lot, and do they incur the same punishment?

Masturbation is forbidden. However, the questioner has not broken her vow as long as she did not practice it with the hand, because oaths are based on intention. She must repent if she knew of its prohibition. If she practiced it with the hand, then along with repentance, she must offer an expiation for an oath or fulfill her vow by fasting two days. It is not permissible to insert a finger into the anus without a legitimate need, as this is a degree of sodomy.