My friend needs blowjob tips!!

Jazzy
So my friend has asked me for advice and tips on giving blowjobs and i have experience myself but I don't know how to answer her question or help her. 
Her question: I'm tryna get my boyfriend to be rough with me but he's always so gentle with me when we're having sex! He said that the only way he'll ever throw me around the way I want him to is if he's sooooooo turned on. He said that he can't throw me around because I'm his baby and he just can't do that. I'm just like wtf.
Any suggestions/ideas?? 
btw she already knows how to give them.. she just doesn't know how to get him extremely off