69 is so much more thrilling than boring old missionary position and bonus, she can never get pregnant this way and when you make her cum she loves it.
If you teach your woman the sword swallowing technique of deep throating you, she will have no choice but to swallow your load because it goes straight down her throat. If you cum together at the same time, she won't hesitate to swallow you.
The first time I taught my wife to go 69, she said "This is fun!" But my big load of cum in her mouth surprised her and she ran to the bathroom to spit it out. Over time I made her cum this way first then she didn't mind me cumming in her mouth after she came. She would comment on how much I came, which 69 always thrilled me and made me cum large loads.