DH and I have ridden a tandem for about 10 years. We absolutely love it, it's much more social than having separate bikes, and there is a brilliant teamwork thing where you have to work together and synchronise your actions to maximise your speed.
Tandems are generally set up so the stronger rider is at the front, as it takes a lot of upper body strength to steer the combined weight of two people. So generally in heterosexual couples, the man is on the front and the women is the "stoker".
However, it makes us an irresistible target for the inevitable shout of "She's not peddling at the back". It's always some smartarse bloke, often not looking like he does any exercise at all, and it's started to really wind me up. Especially when we've just slogged up some endless mountain climb (which is really tough and slow on a tandem) and I've been working my arse off for hours. It just feels really discouraging and sexist - like my effort is invisible.
However, we recently had a quite unpleasant interaction where I expressed my frustration with the comment and the guy took massive exception - because it was only a friendly joke - and I really wished I hadn't said anything.
So is the only possible response to ignore it? It is so frequent and so very irritating!
YABU : It's a joke, get over yourself.
YANBU: It is pretty sexist and annoying.