Because they didn't actually wanna switch partners and set a token goal for that they thought wouldn't be reached. You can tell by the body language they regretted it
ooooh, fuck! brother, thank you sooooo much for this link! i ADORE the baseball cap girl, and now i can enjoy over an HOUR of her thick juicy ass! thank you again!........
.....fuck! the way the black hat girl looks at 26:00 when she smiles and spreads her thighs a little and shoves her pussy forward in the fat girls mouth so she can lick that pussy? i fuckin shoot loads to that every time.....