Were they Mezanah in Egypt?
Radak: Every expression of Zenus regarding Keneses Yisrael is idolatry. Even though this metaphor discusses matters of Bi'ah, this is only the metaphor. And so Yonason translates. Malbim ? the metaphor gives three excuses for Yisrael. (a) Egypt was a place of Zimah; it was full of abominations. (b) It was bi'N'ureihen (time of their youth), when lust burns and intellect is small. I.e. they had not yet properly received Torah and Emunah. (c) Refer to 23:3:3:3.
What is "Mo'achu"?
Rashi: They were crushed, via the Egyptians. This is like "u'Ma'uch" (Vayikra 22:24). Radak ? its grammatical form is like "Do'achu k'Esh Kotzim" (Tehilim 118;12). The Shadayim are a Mashal for Mitzvos that they inherited from their Avos, going back to Avraham.
What is the Nimshal of "Isu Dadei Besuleihen"?
Rashi: The Egyptians taught to them their abominable ways.
Radak: Also this is a Mashal for idolatry.
Malbim: The Egyptians led them astray via their deeds and customs of foreign Avodah. This is depicted as actions done to arouse lust for Bi'ah.
