You got me totally wrong.
I've not stated what a woman should or should not do, must a woman to have babies or not. It is totally her own business only. I addressed the attitude of the society to the Public Display of Affection (PDA) for straights and gays. The wedding ring and holding hand is also a sort of PDA under the discussion.
The different attitude rises from the different expected income to the society. If the society sees a PDA of a heterosexual couple it expects the income in the form of a baby (not every PDA results in this but some amount of it does). Seeing it many time society became reflecting unconsciously that PDA means babies and encourage the PDA (of course if it is a sort of a weird society that needs babies). The more PDA, the more babies. So the PDA encouragement is a sort of benefit which was granted by a society to a heterosexual couple for a new baby to be born. Then if the society sees the PDA of a homosexual couple it reflects about babies but at the same time realizes that there will not be any babies at all. So the society thinks that it was cheated and discourages the homosexual PDA (especially if the homosexual couples demand the same benefits that were granted to the heterosexual couples for creating babies). If a couple disclosures its PDA to the society then the couple gives a message to the society and the society responds to the message back whether it approves the message or not. The society addresses its strategic needs. There is nothing homophobic or antigay in this, this is just about the public display of affection and its influence onto the society.
It is not about granting equality. It is about granting benefits (PDA encouragement) for some achievements (babies). If somebody did something he got some benefits (or salary). What kind of equality can be if someone did nothing and ask for the same benefits (or salary)?