to answer this one:
One young adult asked if masturbation was permissable. Not by doing it with hand but by stimulating oneself in different ways. Sheikh it is very embarrassing for me to ask you, i still can't figure out how that young man did? So stimulating oneself without touching the private part itself. I don't know how to answer this.
Masturbation is haraam, as is indicated by the Qur’aan and Sunnah. See question no. 329.
Masturbation does not necessarily mean using the hands. Whether it is done using the hand or not, or by touching the private part or not, it is still haraam. The scholars have stated this clearly, including Ibn ‘Aabideen in his commentary on al-Durr al-Mukhtaar. Some people may do that using a machine or dummy etc, which are known as “sex toys”. This is also not permitted. Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on him) said that masturbation using the hands or otherwise is haraam according to the evidence of the Qur’aan and Sunnah, and sound opinion, etc. Fataawa al-Shaykh Ibn ‘Uthaymeen, ed. By Ashraf ‘Abd al-Maqsood, 2/931-932.
Sheikh Muhammed Salih Al-Munajjid