I think it's a real shame that the disabled community have to take inclusion in this as a victory. I realise it's because they are marginalised but to be pleased to be part of something that divides opinion on whether it is in very poor taste or not is quite sad to me.
Please don't speak for the 'disabled community' (WTAF is that anyway, we're not some kind of secret society and disability comes in many different forms. We are certainly not one homogeneous group).
Disabled actors are constantly marginalised in favour of able bodied actors - Eddie Redmayne, Daniel Day Lewis etc. There are many people with disabilities who want to act but find acting schools inaccessible or directors who don't want to cast them because of aesthetics. An able bodied actress could have done this role, but why shouldn't it go to someone who understands the situation and is therefore better qualified?
This, like every time a disabled actors pops up in a soap or drama or whatever, is a victory.
It is also a victory because the disability is directly addressed. Not in a 'poor them' way like the close up of Jane's damp crotch in Eastenders this week but because the character is having a chat with friends and is relating a funny story about something that happened because of her disability. No sweeping under the carpet or making her a character who 'just happens to be disabled'.
The final victory is because it acknowledges that disabled people have human desires and like sex too. The fact that people on this thread have commented that they get asked if they're capable of having sex, how they do it, who they do it with shows there us still an assumption that they don't have urges or sex. No, it's not a few random knobheads asking that, it happens frequently. Nearly all of my chair-using friends have been asked this in some form or another.
And inclusion does actually mean acknowledging differences, not ignoring them. Yes, it was a situation only someone who spasms will have (so not even me as I don't have spasms), but by having a platform to talk about that situation, to acknowledge that that is some people's existence and experience, that is inclusion. You may feel it isn't because you find it crass or only acceptable because there's a disability involved but it's an example of positive discrimination, which works to increase inclusively.
There will be people who watched it and said "Yes, that happened to me too!" who suddenly feel included and represented in mainstream advertising where they haven't been before.