living with a partner

i am not good with dental hygene
my three minutes three times a day
are actually one minute twice a day
but somehow
every time I start brushing my teeth
my partner rushes in
and sits on the toilet saying:
“i really have to!”
every single time!
i miss brushing my teeth without
the fart echo behind me.
is it too much to ask that
taste and smell senses match.