Why did he smile the whole time?

So me and this guy aren’t dating it was our first time hooking up with each other he was on top of me looking me in the eyes and smiling and would lean in and gently kiss me and he smiled the entire time and wouldn’t stop looking me in the eyes I’m not complaining I just want to know what it means no other guy has done that also he had already came before he had intercourse with me I gave him oral for literally a minute and then boom but he kept going which is when we started to have sex and all the smiling started