To me this is only an issue when the girl is a minor, when any person is a minor really. In first year of high school a close friend of mine was really into this guy who was 12+ years older than her (she was still a minor), and he occasionally worked for our school. And the creepy thing was just that we always wore school uniforms and all so its not like she would look like she's older than she is. And they went on dates and kissed but thats as far as I could let the two go because he was starting to ask for sex as well and about "taking her virginity". Now since this wasn't in a western country it wasn't really frowned upon or illegal but the school still couldn't know about it so clearly it was still wrong on his part, but I did mostly get mad at her though and lectured her constantly why she shouldn't fuck him.
But anyways everyone has different reactions to the situation, I go batshit no matter who asks (unless the two are adults then its entirely up to them what they wanna do).
As long as they are adults (for the rest of the world) I say go for it. If it were my 18 yr old son/daughter in their senior year of high school, that's a little awkward and something we would need to talk about.
Meh 10 years is nothing, you sometimes can't even See the age difference on their faces. And Mickey is 11 yes older than me XD. It's if the younger Person is young enough to be their child, that's what I find really disturbing (and disgusting)
Because many people look at sex as something that a guy "takes" from a girl and, if the guy is older, then he is taking advantage of a helpless little girl but if the girl initiates something with an older guy, then he was not taking advantage of her.
That's because the guys is picking one that is borderline illegal. However if the girl is 18 or 16 in some places and it's legal then it's fine. Obvioulsy you question the motive of 26-28 year old having sex with a teenager but their is nothing you can do about if it's legal.