No, "monogamous" means, "The practice or condition of having a single sexual partner during a period of time.": http://dictionary.reference.com/search?q=monogamous&db=*
I don't see the word "gender" anywhere in dictionary.reference.com meanings of the noun word "monogamous".
"Homosexuals" (which is a misnomer to start with) never have "sex," they are deviants who have perverted relations.
Sex requires a penis and vagina. Monogamy requires a male and female, so does procreation...
But since you are so ignorant of biology, I will make it simple:
Man + woman = baby... mono-gamos
Man + 2 women = babies... poly-gamos
See, that is not so hard... gamos, from the latin, also denotes fertility, something homosexuals never have. Their relationship is sterile and perverse, producing nothing at all.