Wow you've had so many replies and ao much to take in! I'm going against the majority here as I don't see any huge warning signs. Obviously I haven't seen the rest of your conversations with him so I can't say 100%, but it could be innocent.
Yes the spelling is dreadful, but the last time I checked this had no indication as to someone's character. Could just struggle with spellings, could be dyslexic, but my point remains - you can't judge someone's character on their ability to spell.
Age gaps at your age (within reason! imo 20+ years can be a bit odd) can be common and produce incredible relationships! My Mum started dating my Step-Dad probably in her early 20s (knew him long before - he ran the company she worked for!). My Step-Dad was in his early 30s, there's 11 years between them. They've now been happily together for 30 odd years, had my Brother, and married 7 years ago (yes it took him a while to get down on one knee 😂). I just don't see this age gap as a problem unless of course it starts to create problems for you.
Messaging you saying you're not very good at messaging, and sending a second message before you've replied to the first, could be an indication that he is controlling. On the other hand, he might just really like you and be showing you that by essentially pointing out he wants to speak to you more. I've sent the exact same message many times in the past and the driving force was the very reason I've mentioned above. If someone branded me as controlling after saying something so equivocal, I would be really hurt by that as I'm the least bit controlling. Again, playing devil's adcocate, I haven't seen or heard all the messages/conversations. If you feel there are red flags elsewhere with him that would (alongside this) lead you to think there's controlling behaviour involved, then just use your judgement on whether to continue getting to know him.
Aa for the smacking bum remark (ignoring the grammar for the above reasons), maybe he's just flirty? Maybe he's into the whole dominant/submissive side of things. So many intimate relationships use spanking, from a light touch right the way through to masochism and sadism. These people aren't branded as disgusting, controlling etc etc. We are all adults at the end of the day! What he has said could just be on the playful side of things. Again, it's all in context. If he's constantly displaying red flags in this area, or you're simply not comfortable with it, then you have every right to shut it down or walk away.
I think a lot of these comments are being very judgemental. I'd like to think (particularly with the high media coverage lately about #BeKind), that such harsh conclusions wouldn't be jumped to based on such a small snippet of information. Maybe a lot of the driving forces for the comments on this post are past experience. As I've said throughout, yes these could be indicators that this person is controlling and all the other assumptions that have been made, but I just don't think there's enough in this screenshot alone to conclude any of it.
Ultimately it's about how you feel about it all. If you feel good about potentially finding someone that simply has poor spelling for whatever innocuous reason, will show you he's thinking about you/misses talking to you, and is kinky in the bedroom, then maybe there's nothing to worry about! But if you think that he is displaying controlling and harmful tendencies and is making you uncomfortable, then block and move on to the next one 😊
I'm sure you'll make the right decision. Wishing you luck in the minefield that is called dating!
xx