When a decision has to be made on which English word to use, the translator has to rely on overall context and if his mind set is homophobic even unconsciously the results can be disastrous.
Sexual topics are particularly difficult because of the extraordinary number of euphemisms used.
I am bemused with another possible understanding of this passage. The obsession in Leviticus concerning the mixing of things that should be kept separate sheds a possible light on its understanding. Ancient Israelites were not allowed to mix two crops in the same field, or make cloth out of two different raw materials or plow a field with an ox and a donkey yoked together or crossbreed animals. So it makes sense that mixing in the marriage bed might be considered improper as well. A woman's bed was her own.