We all know the verse, Lev. 18:22 "Thou shalt not lie with a male as with a woman, such a thing is an abomination". But the word translated as abomination is not what is in the original Hebrew. The word used is more like 'taboo'. And it was addressed specifically to the tribe of Levi, the priests. Hence Leviticus. God was telling them not to do that because their neighbors did it. And God was wildly keen on making sure the Hebrews recognized their separateness from their neighbors, as God's chosen.
Scripture below from the Complete Jewish Bible for e-Sword.com
Lev 1:1 Adonai called to Moshe and spoke to him from the tent of meeting. He said,
Lev 1:2 "Speak to the people of Isra'el; say to them, 'When any of you brings an offering to Adonai, you may bring your animal offering either from the herd or from the flock.
Lev 1:7 The descendants of Aharon the cohen are to put fire on the altar and arrange wood on the fire.
Lev 1:8 The sons of Aharon, the cohanim, are to arrange the pieces, the head and the fat on the wood which is on the fire on the altar.
God was speaking to Moses about all the Israelites and mentioned the Sons of Aaron when he was speaking to the priesthood. Lev 18:22 is about the people in my reading of the scriptures.