BF worried about me "fucking lesbian friends" (please reply asap!)

I have three best friends, two are bisexual and one straight. We have sleepovers every weekend.

Every time we do, my boyfriend tells me not to "fuck them, they're lesbians" or "kiss them" etc only because they like girls too. I told him this offends me and my friends and he just said it's an irrational fear. Whos in the right?