Mortimer,
It doesn't always work like that. Sometimes you invite someone up for a drink and you both drink so much that neither of you are into it. Sometimes you invite someone up for a drink and you drink too much and even though she's horny, you're only able to produce something resembling an elevator button, even with a good attitude. Sometimes you invite someone up for a drink and maybe you're horny but she's really not into it. (maybe she's not into you in that way; maybe she's just not into it at the moment; either way she makes it clear that she's not into it.) These are all things that normally happen. They have all happened to me. at one time or another. I assume that one day they will all happen to most of the posters here once they grow up.
I've been hit on by straight women and by gay men. Also, I have hit on women, sometimes successfully, sometimes not so much. I have been invited up for a drink and I have invited others up for a drink. Usually one of us was trying to get the other one into the sack--on that point I'll agree--but as a person who has said "no" (and I'm more into the No means No mentality than the Yes means Yes groupthink), I can attest that accepting an offer for a drink isn't tantamount to accepting an offer of being invaginated or to stand it up on command.
You are buying into too many assumptions, and your arguments are not helping to point out the inherent inefficiency and potential pitfalls of this unnecessary bill.
You're right. This bill is flawed, but Mortimer's comments are certainly not helping that.