Should say “Deny your boyfriend sex until he proposes AND actually marries you...”
He will likely immediately reject you and proceed with the woman who willingly beds him with no commitment.......
Boy are some women dumb........
Flame away ladies......
The reality more often is the girlfriend giving the boyfriend all the sex he wants until she gets him to “put a ring on it” then cutting him off and denying sex, which leads to divorce and ka-ching, she walks with half. Wash, rinse, repeat.