Is sex better the 'smaller' you are?

so i posted this in another thread a bit ago, but nobody is answering - so let's try it here!

"OK, so just a thought - I remember when my BF & I got together I was about 150lb's, and sex was GREAT!

However, it just seems as the bigger I got, the less it felt as good. Not saying it doesn't feel good now, it's just not anywhere near the same and it kinda bums me out!

We've been together for almost 6 years in July, so I'm not sure if things just might be a little...stale..or what lol.I can't tell if it's more or less just me, or if it was really just better when I was smaller?

My ultimate goal is to get to about 130-140, but I'm a long ways away.

Anyone else experience anything like this or have any input?"