3x4 - Mrs Brown's Boys

It seems that everyone in the Brown family has a date for Valentine's Day except Agnes, so she resorts to the internet to find herself a man. Dermot tries to come up with a loving gesture to prove to Maria that he can still be romantic - but he makes the mistake of taking advice from Buster - while Agnes and Winnie are fascinated by Betty's sex manual and Grandad ends up addicted to Viagra.