We are blokes.
We are programmed from a young age to say "you look lovely love".
Cause any thing else from meaning you look Classy, proper sexy, fit, sophisticated, beautiful and such will intently be taken as a negative about her, her mum, sister, she has fat ***, kankles, crows feet, goat cheese thighs, looks like an extra for fat club and such.
SO we instantly say "You look lovely love" and it also means we might get some that night (unless you're crazy).
There is no need for us as we don't really offer any to the shopping experience apart from bag carrier.