For anyone who says that it's against god's will or something similar, I would advise you to look at Leviticus 25:44, Exodus 21:7, Leviticus 15:19-24, Leviticus 1:9, Exodus 35:2, Leviticus 11:10, Leviticus 21:17-21, Leviticus 19:27, Leviticus 11:6-8, Leviticus 19:19, 24:10-16 and 20:14.