My reasons are many-fold!
I love food. I mean, my life revolves around it. When I book a holiday I choose a hotel based on the restaurants that are nearby. I choose day trips based on the lunch they serve Etc. When I go away with DP for a weekend we try and time our day so that we can have a big breakfast, afternoon tea and a proper dinner all in one day 
If we go for a walk, there’s usually a good shop or cafe at the end of it!
I sweat - A LOT! So doing any activity means my clothes get soaking wet and I smell sweaty. This makes me reluctant to eg hoover or briskly tidy up. Everything i do, I do gently and slowly because it doesn’t make me as hot that way.
I eat late at night out of boredom - a bowl of cornflakes or a bar of chocolate at midnight, two or three (25g) bags of crisps while watching TV.
I’m not that fussed about looking thinner, I’m actually ok with a bit of a covering! The thing that pushes me to want to lose weight is finding bending over hard or being breathless, not what I look like.
My DP also doesn’t make me feel bad about being overweight (he is too) so I don’t have that pressure/incentive to lose weight that many people have.
I also have an underactive thyroid which doesn’t help matters. Currently changing my medication and struggling - have put on a stone in about a month.
I do like some fruit and veg, but given the choice, I would never waste a meal having salad.
Plus I live for cake. I’m a great baker, so even if I don’t buy cakes, I have the wherewithal to make anything my heart desires within minutes!
I think that about covers it.
FWIW I just joined BIWI’s bootcamp thread so hopefully in 6 weeks or so, I will be significantly less fat!