I believe the relationship with God (Which often births our value systems), sex and finance is the the most critical factors when considering dating.
As a counselor, I have lost count of how many homes have broken and indeed relationships that ended bitterly because of these things.
But the issue of sex prevails often times over all. While as a Christian counselor I believe strongly in no sex before marriage, I encourage that couples talk extensively about their sex preferences and challenges during their dating and courting years.
As a victim of abuse and rape, I know surely what that can do to someone's perspective of sex if not adequately tackled before entering into a relationship and marriage. So it's very important to talk about EVERYTHING. You can never talk too much in such cases. Ask questions, if while tiptoeing and kissing Oga you noticed consistently that there was never a bulge (Common we often feel it, we just act ignorant ), ask why o. Ask ask ask until you get an answer.
While I don't believe in sex before marriage, be familiar with each other. What turns you on, what are your sexual fantasies and dreams? I was married to a man who enjoys brutality during sex, I would be sleeping and he'd pounce on me and I'd end up with bruises and eventually at the hospital every two weeks. For someone who had been a victim of abuse and rape as a victim, that just messed so much up. It took counseling and a lot of it too after I walked out of the marriage to finally heal back into the person I am now.
I've counselled women whose husbands can't last beyond two minutes and she desires him longer. And I was shocked that they never talked about it before marriage. I know it's almost like a taboo here in Africa to talk about sex. Sex is beautiful and NEVER a thing of shame, it is what some people do with it that shamify it.
So ask, talk, feel body parts self joor (even if na mistakenly ). Forever is too long to live a miserable sexual life mbok.