If two people are not sexually compatible, then the relationship is doomed from the beginning. Sex on the first date is just investigating if one of the many variables needed for a meaningful relationship is present. So, yes to sex on the first date.
It makes sense. But in that case I guess both guys have to consider bad sex as a deal-breaker. And doesn't the sex get better after the guys get to know each other and find out about their likes and dislikes?

