1)
Seeing as "ve'Ish" precludes a Katan, what will be the Din if a man has relations with a male who is a Katan?
1.
Sanhedrin, 54a: As opposed to "Ish", "es Zachar" incorporates a Katan. 1
1
See Torah Temimah, note 26.
2)
Why does the Torah add the (otherwise superfluous) words "Mishk'vei Ishah"?
1.
Rashi: To teach us that he enters the male 'like an eye-brush into the tube'. 1
2.
Sanhedrin, 54a #1: "Mishk'vei" in the plural teaches us that there are two sources of Mishkav on a woman, and that someone who indulges in unnatural relations with her is therefore Chayav just as he is Chayav by a man 2 .