This should be common sense, but I don't know if its common in this subreddit.

A common complaint I've noticed is "Well, you have to make sure a woman's sexually attracted to you or you'll get beta buxxed!" but the way they think she'll show sexual attraction is having sex with a guy immediately.

Unless it's a one night stand, that's a dumb idea. One, most women don't want to fuck a dude they barely know. Two, just because a woman fucks a man she barely knows, doesn't mean she's attracted to him. Even if she is attracted to him, doesn't mean she can't play games.

Apparently, men here think women are manipulative for "with holding sex", but it never crosses their minds that there's women that will use sex as a way to make men too dumb and horny to see through her plots.

Plenty of psycho women use sex to have her side dude "fall in love with her" to get him to kill her husband. Then, try to act like a victim crying "My stalker killed my husband! I never told him to do it!" Plenty of gold diggers fuck the glorified ATM machines instantly, doesn't mean she's not in it for the money.

In case I needed an example of a Black Widow.

"But r/DeadBedrooms!"

Plenty of those posts said they had sex constantly and quickly before it suddenly stopped, so no. You wanting instant sexual gratification does not mean you're going to avoid a Deadbedroom situtation.