Hi, Debbie,
for mine, as per my mum, it's tat a boy ll open the car door for my hubby when he comes to fetch me in the morning.. think tis is the bare basic..
but I do hv a collegue, her wedding, she has another boy (groom's side) to open their car @ their new house.. but my mum said tis one no need..
so, if both side parents no mention, then act blur.. kekeke..