Im 16 my mom still hugs and kisses me even in public places...ewww???

im quite embared to my freinds that they teased me a mamas boy im 6' and my mom is 5'7", my girlfreind says its okey since mom are really like that. how cuold i tell my mom to stop doing this without her getting emotionally affected or feel bad about me. i love my mom no question about that but i see that my older bro hes 18 just enjoys kissing or hugging my mom even in public places such school or church if ever she brings or picks us up. i prefer my dad putting his arm around my shoulder while were walking but my bro prefers putting his arms around my mom and my younger sis she 9 holds my mom and dad hands while we walk in the park or public places. it kind of auckward for me for my mom doing these...please help and thanks