Rav Nachman emphasized not to masturbate but this can be taken too far in that people think this is worse than actual things that are forbidden in the Torah.Even though Rav Nahman was certainly right that it needs a correction to say the ten Psalms [16,32, 41, 42, 59, 77,90, 105 137, 150.] but still it is not an actual prohibition in the Torah.