[header] How to ask your boyfriend to french kiss [title] Start slowly. [step] You should try to get your boyfriend in a romantic mood first, and lower the pressure with a few slower, warm up kisses first. Make these a few soft pecks after it's clear he's in the mood to kiss. 
[substeps] Perhaps your boyfriend will start french kissing you without being asked if you seem receptive enough during the first kisses. The best approach is to wait a bit and see if it happens on its own.