But I was reliably led to believe by a noisy chap I met at the Leicester match that simply identifying someone as a Brighton fan is sufficient to be certain about their sexuality.
Just got two - slight panic when the site flagged an error on mine and wouldn't let me buy. Turns out that the 'senior' threshold for Swansea is 60 years rather than 65 as at Brighton, so I then got the pleasant surprise of only having to pay £17.50 for my ticket.