Bert and mabel in nursing home?

mabel buys bert a viagra tablet for his birthday.immediatly bert gets a big roger on.mabel says"eee bert iv'e never seen ya like that for years,i've been told it will only last an hour at you're age so lets make the most of it and go down the park and do it under the moonlight like we did 70 years ago when you courted me.they hobbled down to the park,roger firmly under berts belt.when they got there the bloody gates were locked.bert undoes his belt and says to mabel "stand on this mabel and i'll give ya a oggie over the gate.mabel lifts her foot up onto berts rampant roger and stops suddenly.bert says wots up mabel i'running outa time.mabel says"aye bert i've just thought.its o k getting over,but how the ???? am i gunna get back.