Would you give a blowjob after vaginal penetration?

My fella wants to have sex and then pull out and put it in my mouth and have me blow him... I'm having a little trouble with this. It's not the bj, I give him bj's all the time but right out of my vagina to my mouth is where I hesitate. Is this something that a lot of guys like? Am I making a big deal of this when it's really not? Your thoughts? less