Dressing!

Ok, Ive always been manually lifted. But my folks are getting old so Im having to adapt. Hoists are all well & good for transferring but how the hell do you guys get pants & trousers up & down???
Iv tried wriggling on the bed but its impossible to get your clothes straight & your pants comfy this way!
Plus (sorry if this is tmi) but if you’re on your period you cant do the whole wriggle on the bed, right.
So how do you get dressed in the morning, undressed at night & pants/trousers up/down for toileting??